January 2004


The Crossroads Institute Newsletter


As we begin the New Year Crossroads has some new and exciting additions and programs. We have added an Educational Neurodevelopment Coordinator who will add valuable academic elements to our programs. Ramsey Bradley holds a Masters Degree in Special Education and Counseling.

The Crossroads Clinic in Phoenix has also added Rhonda Whittaker as a Neurodevelopmental Therapist. Rhonda's Degree in Psychology will add to the already well rounded function of our staff.

Our facilities in Orlando and Austin continue to grow as we expand our services across the country to meet the ever growing need for Neurodevelopment Programs and Centers.

Look for our new Peak Performance evaluation and assessment to come early this year.



NEWS BRIEFS





New Device To Help Premature Babies

12/22/2003
CSIRO Media

Australian scientists have invented a simple device that is ready to help thousands of premature babies in third-world countries who suffer from respiratory difficulties - problems that can cause brain damage and blindness.

Dr Kurt Liffman of CSIRO Biomedical Devices says, "The Oxymix device is a simple, compact and inexpensive device to mix oxygen and atmospheric air".

"The Oxymix was originally conceived for use in developing countries where hospitals have access to medical-grade compressed oxygen, but not to medical-grade compressed air."

In such hospitals, when babies are treated for respiratory difficulties or lung disease, they are usually put in an 'oxygen hood', which is supplied with a small amount of pure oxygen. This may raise the oxygen level, but as the gas flow is so low, the baby's exhaled carbon dioxide builds up in the hood. This build-up can cause serious problems. Also, as the level of oxygen is very hard to maintain, it can vary from being too high (causing blindness) or too low (causing brain damage).

"The air that is provided to pre-term babies must be an appropriate air/oxygen mix and the Oxymix device does this simply and safely. It provides a way of supplying the correct flow rate of any concentration of oxygen from 21% to 100%, via a single 100% oxygen gas supply."

The development of the Oxymix is a joint project between the Australian medical devices company NASCOR and CSIRO BioMedical Devices.

"NASCOR went to CSIRO to help us develop this device because we knew of their expertise in gas flow and turbine technology", says Dr Howard Chilton, Chairman and Director of R&D at NASCOR.

"CSIRO's mechanical design met all of our objectives in a most elegant fashion. It has enabled us to manufacture an inexpensive, highly professional and critically useful device that will help thousands of babies around the world."

NASCOR used high-quality industrial and electronic design to make the Oxymix an easy to use, attractive and safe device. Taking the basic concept, sophisticated electronics were employed to provide internal safety mechanisms and alarm systems to make this a state-of-the-art medical device that also has applications in advanced medical markets.

In advanced medical markets, the alternative products are either a very expensive air/oxygen 'blender' or a very noisy and high gas flow venturi mixer.

It is envisaged that the Oxymix will be available to hospitals for around A$500 (compared to upwards of A$2000 for a blender). In addition, the Oxymix should provide hospitals further cost savings as it does not need a compressed air supply and only uses relatively low flows of oxygen.

CSIRO Biomedical Devices is a specialised R&D unit attached to CSIRO Energy & Thermofluids Engineering, which is a world leader in computational fluid dynamics and offers the only comprehensive fluid dynamics laboratory in Australia.

NASCOR Pty Ltd is a Sydney-based developer of innovative medical devices with specialist expertise in the neonatal care market. The company's product range also includes oxygen hoods and a phototherapy eye mask, which it currently exports to over 30 countries worldwide. NASCOR is always seeking ideas from healthcare workers for new medical devices.



Infant Brain Monitor Offers Window To The Brain

Source: Olympic Medical
12/3/2003

Olympic Medical announces the release of the Olympic CFM 6000, a new cerebral function monitor designed for long-term patient monitoring in the neonatal intensive care unit and other acute-care departments.

The Olympic CFM provides an important missing link in the patient record -- adding a CFM brain tracing to the patient's standard assessment enables clinicians to better diagnose and treat medical conditions.

"The CFM provides medical staff the ability to see the condition of a patient's overall brain activity," explains Dr. Lena Hellstrom-Westas, of Lund University and co-author of the 'Atlas of Amplitude-integrated EEGs in the Newborn.' "With the CFM, we can identify the effects that specific medical conditions have on the brain and provide caregivers with information to improve treatment and assist in diagnosis."

The Olympic CFM allows clinical staff to continuously monitor brain activity. It is simple to use, easy to interpret, and benefits both medical personnel and patients by:

-- Aiding in identifying and treating seizures.

-- Providing a continuous record of brain activity.

-- Improving the accuracy of newborn neurological examinations.

-- Aiding in identifying hypoxic-ischemic encephalopathy (HIE) and predicting its long-term outcome.

-- Monitoring the effects of drugs and other therapies on the brain.

-- Determining the need for further neurological examination or transport.

"In addition to using the Olympic CFM to identify infants at risk for HIE and to identify the presence of seizures, I use the device to help evaluate the progress of patients recovering from conditions and procedures that can adversely affect the brain," stated Dr. Jan E. Paisley, pediatrician and neonatologist at Poudre Valley Hospital in Ft. Collins, Colo., and neonatologist at The Children's Hospital and University Hospital in Denver, Colo.

(HIE, a serious condition in infants caused by inadequate delivery of blood and oxygen to the brain, can result in seizures, mental retardation, learning disorders, and clinical brain death. According to the CDC, HIE occurs in 1 of every 50 premature births in the United States.)



 

Optimizing Brain Function

Daniel G. Amen, MD

The brain is a three-pound supercomputer. It is the command and control center running your life. It is involved in absolutely everything you do. Your brain determines how you think, how you feel, how you act, and how well you get along with other people. Your brain even determines the kind of person you are. It determines how thoughtful you are; how polite or how rude you are. It determines how well you think on your feet, and it is involved with how well you do at work and with your family. Your brain also influences your emotional well being and how well you do with the opposite sex.

Your brain is more complicated than any computer we can imagine. Did you know that you have one hundred billion nerve cells in your brain, and every nerve cell has many connections to other nerve cells? In fact, your brain has more connections in it than there are stars in the universe!

Optimizing your brain's function is essential to being the best you can be, whether at work, in leisure, or in your relationships.

From my work as a clinical neuroscientist, psychiatrist, and brain-imaging expert, here are seven ways to enhance the functioning of your own brain and enhance your life.

1. Protect Your Brain

Protecting the brain from injury, pollution, sleep deprivation, and stress is the first step to optimizing its function. The brain is very soft, while the  skull is really hard. Inside the skull there are many sharp bony ridges. Several brain areas are especially vulnerable to trauma, especially the parts involved with memory, learning, and mood stability. In order to be your best it is essential to protect your brain from injury. Wear your seatbelt when you're in a car, and wear a helmet when you ride a bicycle, motorcycle, or go snowboarding. Make sure children wear helmets. My eleven-year-old knows that if she rides her bicycle without a helmet she'll be grounded from it for a month. One head injury can ruin a life. Along the same lines, do not let children hit soccer balls with their heads. Soccer balls are heavy. Repeatedly slamming a child's head against a soccer ball may cause minor repetitive trauma to the brain. At this time there are not enough studies to say heading soccer balls is safe. I encourage my children to play golf, baseball, and tennis, rather than football, soccer, or hockey.

Current brain imaging research has shown that many chemicals are toxic to brain function. Alcohol, drugs of abuse, nicotine, much caffeine, and many medications decrease blood flow to the brain. When blood flow is decreased the brain cannot work efficiently. In one study done at UCLA, cocaine addicts had 23% less overall brain blood flow compared to a drug free control group. Those cocaine addicts who smoked cigarettes had 45% less blood flow than the control group. In a study I performed on chronic marijuana users, 85% had less activity in their temporal lobes than he control group. The temporal lobes are involved with memory and mood stability. Caffeine constricts blood vessels and has been shown to decrease brain activity. A little bit of caffeine probably doesn't hurt much. Unfortunately, many people use excessive amounts, such as 6 to 10 cups of coffee, tea, or sodas a day. It is hard to be your best when brain activity is diminished. Stay away substances known to be toxic or those that decrease brain activity.

In a similar way, sleep deprivation also decreases brain activity and limits access to learning, memory, and concentration. A recent brain imaging study showed that people who consistently slept less than 7 hours had overall less brain activity. Sleep problems are very common in people who struggle with their thoughts and emotions. Getting enough sleep everyday is essential to brain function.

Scientists have only recently discovered how stress negatively affects brain function. Stress hormones have been shown in animals to be directly toxic to memory centers. Brain cells can die with prolonged stress. Managing stress effectively is essential to good brain function.

2. Feed Your Brain

The fuel you feed your brain has a profound effect on how it functions. Lean protein, complex carbohydrates, and foods rich in omega 3 fatty acids (large cold water fish, such as tuna and salmon, walnuts, Brazil nuts, olive oil, and canola oil) are essential to brain function. Unfortunately, the great American diet is filled with simple sugars and simple carbohydrates, causing many people to feel emotional, sluggish, spacey, and distracted.

What do you have for breakfast? Do you even have breakfast? Today, many children, teens, and adults start the day with either nothing at all or by loading up on simple carbohydrates, such as sugar cereals, Pop Tarts, muffins, bagels, waffles, pancakes, or donuts. In our fast paced society these foods are simple to prepare for the family rushed in the morning, but they cause brain fog and lower performance in many people. Start the day with a healthy breakfast that includes protein, such as eggs, lean meat, or dairy products.

Many people struggle with energy and mental clarity after lunch. I have found that eliminating all simple carbohydrates at lunch (sugar, white bread or other products made from white flour such as bagels and white pasta, potatoes, and rice) can make a dramatic difference in energy and focus in the afternoon. An additional benefit of skipping sugar and simple carbohydrates at lunch is that most people do not feel hunger until dinnertime. I also believe taking a 100% vitamin and mineral supplement is important. Many people do not eat like they should on a regular basis.

3. Kill the ANTs That Invade Your Brain

The thoughts that go through your mind, moment by moment, have a significant impact on how your brain works. Research by Mark George, MD and colleagues at the National Institutes of Health demonstrated that happy, hopeful thoughts had an overall calming effect on the brain, while negative thoughts inflamed brain areas often involved with depression and anxiety. Your thoughts matter.
I often teach my patients how to metaphorically kill the ANTs that invade their minds. ANTs stand for Automatic Negative Thoughts. The ANTs are automatic. They just happen. But they can ruin your whole day, maybe even your life. For example, I once treated a college student who was ready to drop out of school. He thought he was stupid because didn't do well on tests. When his IQ (intelligence level) was tested, however, we discovered that he had an IQ of 135 (in the superior range). He just wasn't a good test taker. I have identified nine different kinds of ANT species, or ways your thoughts can distort incoming information to make you feel bad. Here are four ANT species:

1. Mind reading --- predicting you know that another person is thinking something negative about you without them telling you. I often tell my patients that, "A negative look from someone else may mean nothing more than he or she is constipated. You don't know. You can't read minds. I have 25 years of training in human behavior and I still can't read anyone's mind."

2. Fortune telling -- predicting a bad outcome to a situation before it has occurred. Your mind makes happen what it sees. Unconsciously, predicting failure will often cause failure. For example, if you say, "I know I will fail the test," then you will likely not study hard enough and fail the test.

3. Always or never thinking - this is where you think in words like always, never, every time, or everyone. These thoughts are overgeneralizations which can alter behavior. For example, I have a friend who asked out an attractive woman. She turned him down. He told himself that no one will ever go out with him again. This ANT prevented him from asking out anyone else for over nine months.

4. Guilt beatings -- being overrun by thoughts of "I should have done... I'm bad because…. I must do better at… I have to…). Guilt is powerful at making us feel bad. It is a lousy motivator of behavior.

You do not have to believe every thought that goes through your head. It's important to think about your thoughts to see if they help you or they hurt you. Unfortunately, if you never challenge your thoughts you just "believe them" as if they were true. ANTs can take over and infest your brain. Develop an internal anteater to hunt down and devour the negative thoughts that are ruining your life.

Once you learn about your thoughts, you can chose to think good thoughts and feel good or you can choose to think bad thoughts and feel lousy. You can train your thoughts to be positive and hopeful or you can just allow them to be negative and upset you. That's right, it's up to you! You can learn how to change your thoughts and optimize your brain. One way to learn how to change your thoughts is to notice them when they are negative and talk back to them. If you can correct negative thoughts, you take away their power over you. When you think a negative thought  without challenging it, your mind believes it and your brain reacts to it.

4. Work Your Brain

Your brain is like a muscle. The more you use it, the more you can use it. Every time you learn something new your brain makes a new  connection. Learning enhances blood flow and activity in the brain. If you go for long periods without learning something new you start to lose some of the connections in the brain and you begin to struggle more with memory and learning.

Anatomist Marian Diamond, PhD, from the University of California at Berkely studied aging in rats. Those rats who were allowed an easy life without any new challenges or learning had less brain weight than those rats who were challenged and forced to learn new information in order to be fed. New learning actually caused increased brain density and weight. Strive to learn something new everyday, even if it is just for a short period of time. Einstein said that if a person studies a subject for just 15 minutes a day in a year he will be an expert, and in five years he may be a national expert. Learning is good for your brain.

5. Make Love For Your Brain

In a series of studies by Winnifred B. Cutler, PhD and colleagues at the University of Pennsylvania and later at Stanford University it was found that regular sexual contact had an important impact on physical and emotional well being of women. Sexual contact with a partner at least once a week led to more fertile, regular menstrual cycles, shorter menses, delayed menopause, increased estrogen levels, and delayed aging. Brain imaging studies at UCLA have shown that decreased estrogen levels are associated with overall decreased brain activity and poor memory. Enhancing estrogen levels for women through regular sexual activity enhances overall brain activity and improves memory.

In Dr. Cutler's study the occurrence of orgasm was not as important as the fact that sex was with another person. Intimacy and emotional bonding may be the most influential factors in the positive aspects of sex. As a psychiatrist I have seen many people withhold sex as a way to show hurt, anger, or disappointment. Dr. Cutler's research suggests that this is self-defeating behavior. The more you withhold the worse it may be for you.

Appropriate sex is one of the keys to the brain's fountain of youth.

6. Develop A "Concert State" For Your Brain

Optimal performance is best achieved when a "concert state" exists in the brain. By "concert state" I mean "a relaxed body with a sharp, clear mind," much as you would experience at an exhilarating symphony. Achieving this state requires two simultaneous skills: deep relaxation and focus.

Deep relaxation is easily achieved by most people through diaphragmatic breathing exercises (learning how to breathe with your belly). This is the most natural, efficient way to breathe. Have you ever seen how a puppy or a baby breathes? They breathe almost exclusively with their bellies. A quick way to learn belly breathing is to lay on the floor and put a book on your belly. As you breathe in make the book rise as you fill your lower lungs with air. As you breathe out make the book fall as you use your belly to exhale all the air out of your lungs. Take slow, deep breaths, less than 7 a minute. One of my patients told me that it was impossible for him to be anxious or mad when he breathed in this way.

Use music to help develop concentration skills. In a famous study at the University of California at Irvine, students who listened to Mozart's Sonata  for 2 Pianos (k448) increased visual-spatial intelligence by about 10 percent. Another recent study demonstrated that students who play a musical instrument scored higher on average on the SAT than children who did not play music. Music can either help or hurt concentration. In a recent study from my clinic, we had 12 teenagers play the game Memory while they listened to different types of music: rock, rap, classical, and no music. Rap was associated with the worst performance. The rock group also scored poorly. Interestingly, the group did slightly better with classical music than no music at all.

Another technique for developing clear focus is the "One Page Miracle." On one piece of paper write down the following headings:
 

*  relationships,
*  work/school
*  money
*  physical health
*  emotional health
*  spiritual health.


Next to each heading write down what you want in each area. For example, under relationships, "I want to have a kind, loving, connected relationship with my children." When you finish writing all of your goals make multiple copies of it and prominently display it where you can see it several times each day. Frequently ask yourself, "Is my behavior getting me what I want?" This exercise helps to keep you focused on the things that are most important in your life.

Work to develop a "concert state" by relaxing your body and developing mental clarity.

7. Treat Brain Problems Early

Many people sabotage themselves by denying they have brain problems until significant damage has been done to their lives. Most psychiatrists feel that there is a significant brain component to depression, anxiety problems, attention deficit disorder, obsessive compulsive disorder, substance abuse problems, and even violence. Unfortunately, the stigma associated with seeing a psychiatrist still prevents people from seeking help for obvious problems.

Clearly, the earlier people seek help for these problems the less negative impact they will have on their lives. If you struggle with any of these problems you are not alone. According to the National Institutes of Health 49% of Americans will have a psychiatric illness (depression, anxiety, ADD, OCD, substance abuse problems, etc.) at some point in their lives. Successful people have problems, they are smart enough to seek help.

The earlier the better.

Your life can only improve with an optimized brain.
 




RESEARCH AND ADVANCEMENTS




Stress and the Brain

Not to add to your stress level, but accumulating research indicates that continuous or intense stress may sometimes negatively influence the brain and its function. Studies find evidence that severe stress may sometimes alter brain cells, brain structure and brain function. As a consequence memory problems and the development of some mental diseases, including depression, may erupt. On the positive side, research also suggests that methods under investigation may be able to help ward off or even possibly reverse some of the stress effects.

Tuesday it was tornadoes. Saturday, SARS. Today, terrorism.

Increasingly worrisome headlines make the effort to understand how stress affects the brain take on a new level of importance. When we experience a stressful situation, our stress system activates a slew of biological mechanisms that boost our strength and energy, among other functions, to help us cope. Accumulating research, however, indicates that perpetual or intense stress sometimes may harm the brain and its function. These insights are leading to:

* A better understanding of how environmental factors can influence the brain.

* New ways to prevent or treat the negative effects of stress.

Animal research provided some of the first clues that stress sometimes may negatively affect the brain. In one example, researchers gave rats excess stress by restraining them daily. Extensions on brain cells, known as dendrites, withered in the hippocampus, a brain area important for memory. Animal research also indicates that stress can diminish the naturally occurring replacement of brain cells in the hippocampus, one of the few brain regions that can produce new cells throughout life. Either of these scenarios, shrinking dendrites or a decrease in the birth of new cells, might affect brain cell communication and memory function. Findings that repeated stress impairs some memory in animals, backs the idea.

Examinations of people with Cushing’s syndrome also suggest that ongoing or severe stress may harm the hippocampus and memory. These patients produce massive amounts of the stress hormone, cortisol, (see image) making them a good model of what may occur when the stress system is put in overdrive. Scientists find that individuals with Cushing’s have memory problems and a smaller than normal hippocampus.

Research also reveals relationships between exceptional stress and ailments such as depression and post-traumatic stress disorder (PTSD), an anxiety condition that some people develop after experiencing a traumatic event. For example, measures of stress chemicals indicate that the stress system sometimes is overactive in some people with these ailments. Evidence suggests that this stress effect also can influence the function of serotonin, a brain chemical thought to affect emotional states and the development of depression. Additional studies find that some people with extreme depression or PTSD have a smaller hippocampus and experience memory problems. It’s not clear, however, whether stress triggers these changes or whether people are born with the differences, which then increase their vulnerability to develop the ailments.

Researchers plan to sort out these details and others, including the effects of varying degrees of stress. In addition they want to pinpoint when stress turns detrimental and why some people seem more immune to stress than others.

Scientists also are investigating ways to rebalance the stress system and protect or repair the brain. A cortisol-targeting drug, for one, may help. Normalizing cortisol activity in Cushing’s patients increases the size of their hippocampus and improves aspects of their memory. This suggests that cortisol-targeting drugs may aid other stress-related ailments. In fact, cortisol-targeting drugs helped alleviate some forms of depression, according to recent small studies.

Methods that boost the birth of new brain cells also may oppose some detrimental effects of stress. For example, depression treatments, such as drugs that target serotonin, can counter negative effects of stress and boost the birth of new brain cells, according to animal research. Preliminary findings indicate that a serotonin treatment increases hippocampus size and improves the memory of patients with PTSD.

Non-drug treatments also may provide benefits. Researchers are examining whether exercise, shown earlier to boost the production of brain cells, can protect rodents from the effects of stress.

The best defense? Avoid excess stress when possible.



 



Brain Development and Learning

Paul J. Eslinger

There is an exquisite synchrony between how the brain develops and what shapes its growth and maturation. It is evident from early infancy that the structure and connections of the brain are indeed sculpted by a number of environmental and biological influences. As the center for thought, emotion, actions-plans and self-regulation of mind and body, the brain undergoes a slow protracted growth process that actually is life-long. It is most intense in the first few years of life, rising rapidly throughout childhood into adolescence and early adulthood, and continues with different phases of growth and change throughout adult life.

What this tells us about the influence of early experiences is that they can have a profound impact upon the subsequent potential of each person. It is in the first year of life that the basic soundscape of one’s native language becomes mapped in the nervous system, providing the phonemic elements that evolve into language. Other languages can be acquired at the same time with much less effort than at later ages. Parents generally play the most prominent role of educators in these early years, which are being recognized as critical to subsequent brain and cognitive development.

There are two novel ideas emerging from research on cognition and brain development that may provide new directions for educational planning and implementation. Two of these ideas, Multiple Memory Systems and Executive Functions, will be briefly described.

The human brain has remarkable plasticity, the ability to be shaped and modified by growth of new and more complex connections among cells. Some neurons develop up to 50,000 connections, a mind-boggling number when one considers there are billions of neurons in the brain. The basic property of the cerebral cortex (the external layers or convolutions of the brain) is to store information. Although we do not understand exactly how such storage occurs, it is clear that it takes place in multiple cortical areas that are dedicated to different kinds of memory. Some areas are developed into knowledge systems that emerge from language, visual-spatial, or motor memories. Other regions of the brain store information for emotional experiences and for larger memory units, such as knowing how to complete a home assignment or securing a teaching position. Therefore, learning and memory are not limited to a single neural system or a single process. There are multiple memory systems spread out in different brain areas, with pathways that can interconnect them in diverse and even individual ways.

There are multiple memory systems spread out in different brain areas.

Because learning and memory abilities are generally not fully developed in all of these areas, educational approaches that use multiple memory systems lead to more in-depth knowledge and higher retention. For example, teaching materials that use visual and personal analogies, visual schematics showing how verbal concepts spatially relate to each other, and activities that implement problem-solving steps provide opportunities for multiple memory system involvement. Students who are weaker in one memory-processing stream may then readily compensate when other processing modes are available.

Executive function is another recently formulated neuropsychological concept. An executor is charged with responsibilities, such as surveying information, imposing organization, formulating plans, setting goals, keeping track of changing circumstances, and even anticipating numerous possibilities and modifying goals and plans accordingly. In neuropsychological studies, executive functions have been shown to be very different from general intelligence and memory.

The young child is a budding executor of their own knowledge, emotions, and behavior. Those areas of the brain that provide executive functions are the last to mature, usually not until early adulthood. During development, executive functions become progressively interconnected with the knowledge domains for facts, figures, words and images (the “what” and “where aspects of knowledge) for purposes of how, why and when utilize such knowledge for goal-directed purposes. For example, how do I identify and organize the steps for completing and independent project? Why is this information related to that information? When do I self-check my progress in order to evaluate how much I have left to do? These are questions educators may hear from time to time, but such questions reveal what may be fundamental processes for human adaptation and achievement – managing ourselves as learners, developing awareness of our knowledge as well as lack of knowledge, and knowing how to accomplish various goals by using executive or metacognitive skills. A substantial part of executive functions is developing the mental models of these “how,” “why,” and “when” processes.

The earliest elements of executive functions begin in parent-child interactions.

Executive functions are shaped by many educational influences and comprise a set of skills and knowledge. Can executive functions be taught in any direct fashion? The answer is yes. The earliest elements of executive functions begin in parent-child interactions, expand greatly in play, and are thought to blossom in more independent and complex academic, social and recreational activities. Children become as effective a personal executor as they are challenged and trained to be. Executive function skills have been incorporated into writing, reading, and mathematical courses, emphasizing specific strategies for learning, implementing self-instructional steps, and promoting collaborative as well as independent practice. Such approaches facilitate the acquisition of self-regulatory skills that help a child learn, organize, and meet goals, not only within school but also throughout life.

Parents, educators and neuroscientists can begin a dialogue about how to further understand and utilize multiple memory systems, and how to introduce multiple language soundscapes in early life, and how to foster development of elementary and advanced executive functions in each child. With such collaboration, it may be possible to achieve a more successful combination of knowledge acquisition and utilization and a broader range of skills for each child’s adaptation and achievement throughout life.





ADD/ADHD


Attention Deficit Drugs May Have Long-Term Effect

Dec 8, 2003

WASHINGTON (Reuters) - Drugs given to children to treat attention deficit hyperactivity disorder could have long-term effects on their growing brains, studies on rats suggest.

Several studies published on Monday show that rats given a popular ADHD drug were less likely to want to use cocaine later in life, but also often acted clinically depressed and behaved differently from rats give dummy injections.


While rats are different from humans, the studies suggest that doctors should watch children for long-term effects, too.


In the United States between 3 percent and 5 percent of children are diagnosed with attention deficit disorder, marked by reduced ability to concentrate, difficulty in organizing and impulsive behavior.


Patients are commonly prescribed stimulants but the practice is sometimes controversial.


William Carlezon of McLean Hospital and Harvard MedicalSchool in Boston and colleagues raised two groups of rats. One was given Ritalin , known generically as methylphenidate, during the rat equivalent of pre-adolescence, while the other was given a salt water injection.


When they matured, the rats were tested for "learned helplessness" -- how quickly they gave up on behavioral tasks under stress.


"Rats exposed to Ritalin as juveniles showed large increases in learned-helplessness behavior during adulthood, suggesting a tendency toward depression," Carlezon said in a statement.


But rats, which generally like cocaine, were less likely to eat it if they had been give Ritalin.


Carlezon said he did not believe the effects were specific to Ritalin, made by Swiss drug giant Novartis. It could instead be a general effect of stimulant drugs, many of which act by increasing the activity of a key message-carrying chemical called dopamine.


Higher dopamine levels could affect the way brain cells cement their connections during development, Carlezon wrote in the Dec. 15 issue of the journal Biological Psychiatry.


A team at the University of Texas Southwestern Medical Center at Dallas found that adult rats were less responsive to rewarding stimuli and reacted more to stress if they had been given methylphenidate as youngsters.


A third study done by a team at Finch University of Health Sciences/The Chicago Medical School found changes in how dopamine neurons responded to methylphenidate.


"These three studies remind us how limited our knowledge is of the neurochemical and functional characteristics of the human brain during childhood and adolescence and on the effects of psychotropic drugs on brain development," Dr. Thomas Insel, Director of the National Institute of Mental Health, wrote in a commentary.





Imaging Children With ADHD


American Medical Association
12/4/2003

Children with attention deficit-hyperactivity disorder (ADHD) may have significantly altered levels of important neurotransmitters (biochemicals that carry signals to and from cells) in the frontal region of the brain, according to a study publishing in the December issue of the Journal of Neuropsychiatry and Clinical Neurosciences.

"Our data show children with ADHD had a two-and-half-fold increased level of glutamate, an excitatory brain chemical that can be toxic to nerve cells," said lead author Helen Courvoisie, M.D., assistant professor, division of child and adolescent psychiatry, department of psychiatry and behavioral sciences at the Johns Hopkins Medical Institutions, Baltimore. "The data also suggest a decreased level of GABA, a neuro-inhibitor. This combination may explain the behavior of children with poor impulse control."

Dr. Courvoisie spoke today at an American Medical Association media briefing on advances in neurology in New York.

"Children with ADHD have problems that are associated with the part of the brain called the frontal lobes," said Dr. Courvoisie. "The frontal lobes are like the 'boss of the brain,' responsible for what we call executive functioning — telling the brain and body what to do." This area regulates impulse control, attention, movement and elaborating on thoughts.

The study used a variation of magnetic resonate imaging (MRI) technology to measure the level of six metabolites (any substance produced by metabolism) in a small portion of the frontal lobe section of the brains of 16 children, 6 to 12 years old. "The MRI machine is reprogrammed so that instead of creating pictures, it allows us to explore whether there are alterations in brain metabolites in children with ADHD," said Dr. Courvoisie.

Eight of the children had been previously diagnosed with hyperactive type ADHD at the University of North Carolina at Chapel Hill. They were compared with study participants that showed no signs of ADHD, who were matched according to age and sex. "There are three types of ADHD: attention-deficit, hyperactive and combined type," explained Dr. Courvoisie. "We focused on the hyperactive type to try to get the clearest picture of what was going awry with their executive function."

"There is a partial malfunctioning of this 'boss of the brain' in ADHD," said Dr. Courvoisie. "I describe it as having a poor manager, like the pointy-headed boss in the Dilbert cartoons — he doesn't know what he's doing, he can"t run a good company and everyone becomes frustrated."

ADHD is characterized by difficulty concentrating and paying attention, and a high degree of restless and impulsive behavior. Although the problems may be less pronounced in adulthood, it is often a lifelong condition.

There are three classifications of ADHD, which is based on the relative amount of attention deficit versus hyperactivity:
* Inattentive type: predominately attention problems, such as failing to pay attention, being careless, having difficulty attending to tasks, being forgetful and easily distracted, etc.
* Hyperactive type: predominately problems with hyperactivity, such as excessive fidgeting, restlessness, impulsive behavior, talking excessively, interrupting others, etc.
* Combined type: shows signs of both attention deficit and hyperactivity without having predominate characteristics of either

"The great increase in the diagnosis of ADHD has created some controversy," said Dr. Courvoisie. "It is important to understand and identify the underlying neurology of ADHD so that children with ADHD can be appropriately treated. There are real deficients —these are not just fidgety kids."

Understanding real differences in the workings of the brains of children with ADHD could ultimately help target and improve treatment and diagnosis, according to Dr. Courvoisie.





Prolonged Use of Ritalin May Change Brain

THURSDAY, Dec. 18 (HealthDayNews) -- Misuse of Ritalin (news - web sites) may have possible long-term effects on the brain and behavior, claim three animal studies in the December issue of Biological Psychiatry.

Ritalin is the recommended treatment for attention-deficit hyperactivity disorder (ADHD). Numerous previous studies have shown it's safe and effective when used as prescribed.


But these three studies found Ritalin caused changes in the brains of adolescent and pre-adolescent animals that persisted into adulthood. If the findings are applicable to humans, they could offer important information about young people who use Ritalin and similar stimulants as recreational drugs.


The first study found low doses of Ritalin caused changes in rat brain cells that made them more sensitive to the rewarding effects of cocaine. The second study found exposing pre-adolescent rats to Ritalin actually decreased sensitivity to cocaine reward when the rats reached adulthood, but increased other behaviors that could indicate depression.


The third study found adult rats chronically exposed to Ritalin before adolescence were less responsive to natural rewards, such as sugar and sex, and more sensitive to stressful situations. The adult rats also demonstrated increased anxiety behaviors and enhanced blood levels of stress hormones.

Copyright © 2003 HealthDay. All rights reserved.



Brain Differences Found in ADHD Kids

By Amanda Gardner
HealthDay Reporter

FRIDAY, Dec. 5 (HealthDayNews) -- Children with attention-deficit hyperactivity disorder (ADHD) may harbor unusual levels of certain neurotransmitters in the frontal part of their brains.

Researchers reporting in the December issue of the Journal of Neuropsychiatry and Clinical Neurosciences found levels of glutamate were increased in ADHD children while levels of GABA, a neuro-inhibitor, were decreased.


If seeing is believing, then the research does add to the "believability" and "reality" of this disorder, which manifests in behavioral changes. It is considered the most common childhood illness; on average, almost every classroom in the United States will have one child who needs to be treated for this disorder.


"There's such a lot of contention about ADHD and, in my opinion, too many kids are diagnosed because they fidget," says study author Dr. Helen Courvoisie, an assistant professor of child and adolescent psychiatry at the Johns Hopkins Medical Institutions in Baltimore. "What studies like mine will do is show there is a biological basis to those kids who really have ADHD."


Dr. Bradley Peterson, a professor of pediatric neuropsychiatry at Columbia University and New York State Psychiatric Institute in New York City, agrees. "Historically, [seeing is believing] has been very true for other conditions," he says. "Brain imaging studies showed pretty major differences in brain structure that really legitimized schizophrenia as a biological disturbance. I think the same is true for other conditions."


Although the study is small, it is in line with previous work. "It's one more brick in the wall," says Russell Barkley, a professor of psychiatry at the Medical University of South Carolina in Charleston. "It is consistent with a number of other larger studies that have shown both structural and functional abnormalities in ADHD children."


The frontal lobe is responsible for executive functioning, which regulates impulse control, attention and other thought processes that can be compromised in people with ADHD.


Here, the study authors looked at eight children aged 6 to 12 who had been diagnosed with hyperactive-type ADHD. Of the three types of ADHD (attention-deficit, hyperactive and combined), this one most involves a malfunction of executive function. These children were compared to eight children without ADHD.


All of the ADHD children were taking some kind of stimulant medication, such as Ritalin (news - web sites), but not for the 24 hours preceding the scan.


All 16 children first underwent neuropsychological and IQ testing in one session. Later, they had a type of magnetic resonance imaging (MRI) that measured the levels of six metabolites in the frontal part of the brain.


The results revealed that children in the ADHD group seemed to have decreased levels of GABA, which might explain poor impulse control, and higher levels of glutamate, which is excitatory and can be toxic to nerve cells in high amounts. Both GABA and glutamate are neurotransmitters, or brain chemical messengers.


The levels of the neurotransmitters were measured in relation to each other, Barkley points out. "It's not necessarily overall levels that were interesting," he says. "It really is the relative proportion of chemicals."


Future studies will need to be larger and will need to "see what kids look like both on and off medication," Courvoisie says.


Eventually, there may be implications for drug therapies. "Certainly the hope would be that by understanding the biological basis for these conditions, it'll provide clues as to how better to intervene therapeutically," Peterson says. "This particular set of findings suggests that some neurotransmitters may be increased in concentration in the frontal lobe in children of ADHD. We don't have good ways of manipulating those neurotransmitters currently, but we will soon and that may be helpful."





ALZHEIMER'S RESEARCH




Midlife Brain Crisis Spawns Late-Life Alzheimer's

University of California - Los Angeles
12/29/2003

A novel model of human brain aging developed by a UCLA neuroscientist identifies midlife breakdown of myelin, a fatty insulation coating the brain's internal wiring, as a possible key to the onset of Alzheimer's disease later in life.

Detailed in the January edition of the peer-reviewed journal Neurobiology of Aging, the model presents opportunities to explore how lifestyle changes, hormone replacement therapy, higher education or treatment with common medications in middle age might help brains remain healthy longer.

"This model embraces the human brain as a high-speed Internet rather than a computer. The quality of the Internet's connections is the key to its speed, fidelity and overall capability," said Dr. George Bartzokis, the author and visiting professor of neurology at UCLA's David Geffen School of Medicine. He also is director of the UCLA Memory Disorders and Alzheimer's Disease Clinic and Clinical Core director of the UCLA Alzheimer's Disease Research Center.

"Close analysis of brain tissue and MRIs clearly shows that the brain's wiring develops until middle age and then begins to decline as the breakdown of myelin triggers a destructive domino affect. Our time at the peak is short indeed," Bartzokis said. "The challenge for science and medicine is to figure out how to extend the brain's peak performance so that our minds function as long as our bodies."

The journal also published six commentaries on the model written by investigators from around the world, as well as a response by Bartzokis. The response expands on his findings to discuss the role myelin plays in overall brain function as well as its dysfunction in many other neuropsychiatric disorders that occur over the human lifespan.

Myelin is a sheet of lipid, or fat, with very high cholesterol content -- the highest of any brain tissue. The high cholesterol content allows myelin to wrap tightly around axons, speeding messages through the brain by insulating these neural "wire" connections.

As the brain continues to develop in adulthood and as myelin is produced in greater and greater quantities, cholesterol levels in the brain grow and eventually promote the production of a toxic protein that attacks the brain. The protein attacks myelin, disrupts message transfer through the axons and eventually leads to the brain/mind-destroying plaques and tangles visible years later in the cortex of Alzheimer's patients.

Bartzokis' analysis of magnetic resonance images and post-mortem tissue data suggests that genetic factors coupled with the brain's own developmental process of increasing cholesterol and iron levels in middle age help degrade the myelin. The papers describe how complex connections that take the longest to develop and allow humans to think at their highest level are among the first to deteriorate as the brain's myelin breaks down in reverse order of development.

"The body was designed to myelinate through the natural lifespan. Medical advances, however, have expanded the lifespan well beyond the brain's natural capacity to operate in a healthy, efficient manner," Bartzokis said. "The process of adult brain development and becoming 'wiser' has this downside that evolution could not anticipate."

This new model of brain development and degeneration suggests that the best time to address the inevitability of myelin breakdown is when it begins, in middle age. By the time the effects of Alzheimer's disease become apparent in a patient's 60s, 70s or 80s, it may be too late to reverse the course of the disease.

Preventive therapies worth investigating include cholesterol- and iron-lowering medications, anti-inflammatory medications, diet and exercise programs and possibly hormone replacement therapy designed to prevent menopause rather than simply ease the symptoms. In addition, education or other activities designed to keep the mind active may stimulate the production of myelin. Finally, there may be ways to address genetic and environmental factors that accelerate the degeneration process.

Commentaries accompanying the paper were written by Drs. Francine M. Benes, Harvard Medical School; Heiko Braak and Kelly Del Tredici, Frankfurt/Main, Germany; James R. Connor, Penn State University College of Medicine, M.S. Hershey Medical Center; Terry L. Jernigan, University of California, San Diego; Mark Noble, University of Rochester Medical Center; and Gregory T. Whitman, and Carl W. Cotman, University of California, Irvine.



Alzheimer's linked to daydreams

Dr Cindy Lustig

Alzheimer's disease may be linked to processing problems in part of the brain that triggers daydreams.

Activity in this area normally reduces or shuts down when somebody has to concentrate on a task at hand.

But scientists at Washington University in St Louis have found evidence from brain scans that this may not be the case in people with Alzheimer's.

The work, published in the Proceedings of the National Academy of Sciences, may lead to new diagnostic tests.

The researchers found there are parts of the brain in young people that are very active when they are day dreaming.

But when they are asked to do something, they seem to have the ability to shut down activity in these areas.

The researchers found that activity in these parts of the brains is not so pronounced as people get older.

But it appears that when people with Alzheimer's disease are asked to concentrate, activity in these areas is actually stimulated, rather than suppressed.

Lead researcher Dr Cindy Lustig said: "What we found in our study is that rather than turning these regions off when asked to concentrate, as young adults do, people with Alzheimer's seem to turn them on.

"This might reflect a 'broken brain' in Alzheimer's, making it hard for people to turn these brain regions on or off appropriately.

"Or, more optimistically, it might be an attempt to compensate for the memory problems that come with Alzheimer's."

Default network

It is known that the brain has the capacity to reduce activity in one region so that resources can be shifted to other areas where more challenging mental tasks are currently being processed.

Problems with this ability have been linked other neurological illnesses, such as schizophrenia and amnesia.

There is also mounting evidence to support the existence of a "default network" in the brain - a set of interconnected areas responsible for routine, passive mental processes.

The latest research suggests that Alzheimer's may be linked to problems with switching this "default network" on and off effectively.

Areas of the brain thought to be included in this network include medial frontal, the lateral parietal and the posterior cingulate regions of the cortex.

The researchers found the biggest differences in activity in the posterior cingulate cortex.

Dr Lustig said: "In the long run, this quirk may help us understand what's going wrong with fundamental cognitive processes that underlie mental declines associated with aging and Alzheimer's.

"In the meantime, we're very interested in whether these changes can be used to identify older adults in the earliest stages of Alzheimer's disease so that they can begin treatment as soon as possible."

Rebecca Wood, chief executive of the Alzheimer's Research Trust told BBC News Online the finding was potentially significant as the region of the brain on which the researchers focused was known to play a role in memory.

It was also known to be damaged in people with Alzheimer's.

She said: "We need to do much more work to develop these results, but this exciting research could lead to a greater understanding of Alzheimer's, including improved diagnosis in the early stages and even prevention of this devastating disease."





AUDITORY NEWS




Hearing Research

Interaural time coincidence detectors are present at birth: evidence from binaural interaction    
Miriam Furst, Ian Bresloff, Robert A. Levine, Paul L. Merlob and Joseph J. Attias

January 2004

Abstract

Binaural processing of sounds in mammals is presumably initiated within the auditory nuclei of the caudal pons. The binaural difference waveform (BD) can be derived from the sum of the waveforms evoked by right monaural clicks plus left monaural clicks minus the waveform evoked by binaural clicks.

In adults, the BD's first positive peak (Beta) is large only for stimuli with interaural time differences (ITDs) that produce a fused acoustic percept.

Humans at birth can localize and discriminate sound sources, but their head circumference is about two-thirds of an adult head. In order to test whether (Beta) is related to head circumference, we recorded (Beta) in human neonates as a function of ITD.

Binaural clicks with ITDs ranging between 0 and 1000 µs were used to derive BD waveforms in 34 neonates. For ITD=0, (Beta) was detectable in 56% of newborns. The incidence of (Beta) detection then decreased as ITD increased.

Only 9% of the babies had detectable (Beta) for all ITDs. No correlation was found between the existence of (Beta) and other properties of the monaural or binaural auditory brainstem response. The finding that for some infants (Beta) was present for all ITDs up to 1.0 ms suggests that there is no recalibration of brainstem delay lines with head growth.

Our data suggest that the brainstem auditory pathway for detecting interaural time differences in the adult is probably present at birth.

Maturational factors such as increased myelination and greater firing synchrony probably improve the detectability of (Beta) with age. The second peak in the BD waveform (Delta) was highly correlated with the existence of wave VI in the binaural and monaural waveforms.




A normative study of tympanic membrane motion in humans using a laser Doppler vibrometer (LDV)
Kenneth R. Whittemore Jr., Saumil N. Merchant, Becky B. Poon and John J. Rosowski
Department of Surgery, Division of Otolaryngology, University of Rochester School of Medicine and Dentistry,.
Hearing Research, 2004, 187:1-2:85-104

Abstract

Laser Doppler vibrometry was used to measure the sound-induced tympanic membrane (TM) velocity, assessed near the umbo, in 56 normal hearing human subjects at nine sound frequencies. A second series of measurements was made in 47 subjects with sensorineural hearing loss (SNHL). Each set of measurements has features in common with previously published results. The measured velocity magnitude (normalized by the stimulus sound pressure) at any one frequency ranged among subjects by factors of 3–0.3 (±10 dB) from the mean and the phase angle of the normalized velocity ranged from ±15° around the mean at low frequencies to more than ±200° around the mean at 6 kHz. Measurements repeated after intervals of minutes to months were generally within 40% in magnitude (±3 dB) and 20° in phase. Sources of variability included the effect of small differences in the location of the measurement on the TM and small static middle-ear pressures. No effects of stimulus level, ear sidedness (right or left), gender, age or the presence or absence of SNHL were found. These results provide a baseline normal response for studies of TM velocity with conductive hearing losses of different etiologies.




BRAIN INJURY




'They are shadows'

Dec 17, 2003 Chicago Tribune
By Julia Keller, Tribune staff reporter

Kane's brain would work the way it was designed to work, with the perfect synchronicity of idea and action, of intention and gesture. If he wanted to scratch his left ear, he did; if he wanted to ponder the existence of a higher power governing human affairs, he did that too. Everything meshed.

And then, at about 1:10 a.m. on June 23, Kane lost control of his Honda Gold Wing motorcycle along Interstate Highway 290 near Itasca. His head smashed into a concrete barricade.

At that moment, Kane's brain -- the approximately 3-pound pinkish-gray mass suspended inside his skull, that he, like most people, largely took for granted as long as it did its job -- was ripped from its moorings like a sailboat in a hurricane.

Whatever Kane was contemplating in the seconds before the accident -- his wife, Jill, his son, Jimmy, his ambitions or his memories or simply how pleasant the night air felt on his face -- it was the final time his brain would function the way it had functioned throughout the 48 years of his life.

In less time than it takes to say "Jim Kane," he was no longer Jim Kane.

"With brain injury," said Dr. Ghada Ahmed, "you are reborn. You are not the same person you were."

Ahmed would meet Kane 49 days later, when he was taken from an acute-care hospital to the Brain Injury Medicine Unit on the 10th floor of the Rehabilitation Institute of Chicago, which, after its recent renovation, is now the newest and among the most innovative units in the nation.

In the United States, a traumatic brain injury occurs at least every 21 seconds, making it the No. 1 cause of death and disability for people under 44.

So prevalent is brain injury, and so little does the public seem to be aware of it, that earlier this year the Centers for Disease Control dubbed traumatic brain injury a "silent epidemic."

An estimated 1.5 million Americans annually suffer a traumatic brain injury. The exact number is a murky unknown because of significant underreporting and misdiagnosis. Even mild traumatic brain injury, including sports-related concussions, can result in physical and emotional problems. Some 5.3 million Americans are living with disabilities from brain injury.

Yet it is through brain injury that researchers have gleaned much of their knowledge about the brain, from a new understanding of consciousness to a realization that undiagnosed brain injury among children may be complicit in violent behavior later in life.

Scientists have discovered more about the brain in the past 10 years than in the previous 10 centuries -- yet by all accounts, are still at the threshold of understanding the brain's deepest secrets.

"The brain is the last bastion of science," said Dr. Ricardo G. Senno, medical director of RIC's brain injury unit. "Brain injury medicine is where cardiology was 50 years ago."

Had his accident occurred in 1993 instead of 2003, Kane most likely would have died. In the past several years, however, better emergency care at accident scenes and improved neurosurgical techniques in trauma centers mean that more people than ever before survive severe brain injury.

Yet they face excruciating ordeals. Dr. Jeff Frank, director of the Neurosurgical Intensive Care Unit at the University of Chicago Hospital, said, "In critical care, the decisions are life and death decisions. In neuro intensive care, it's a more complicated dynamic. It's not, `Will the patient live or die?' but, `What does the patient want to live with?'

"Brain injury is unique," he added, "because it affects personhood."

Most people think of themselves as unalterably unique. They may change their opinions about their political affiliation or their favorite novel, but their fundamental essence is inviolate. Yet with brain injury, that sturdy self seems to drop away like an elevator in free fall, which is what makes brain injury uncannily devastating, even among other life-changing calamities such as spinal cord injury.

Christopher Reeve made that point when he titled his 1998 autobiography "Still Me." Even without the use of his limbs, the paraplegic actor and advocate for the disabled was still himself. He didn't suffer a brain injury, so his personality was intact.

The families of people with brain injury, however, know another reality. For them, "it's like there is a new family member," said Dinh To, one of two social workers on RIC's brain injury unit. "That's the hard part. It's like they are bringing home a new baby. Or an adopted child."

During stays that average 26 days, patients on the 10th floor begin the second half of their lives: That was then; this is now. The 10th floor is the place where they first become aware of the difference -- the difference between a brain that did their bidding to a brain that has turned into an "enemy," as Kane would later describe it.

"Families always ask, `Will he be the same?' The answer is no," said Tom Wolf, To's colleague on the unit. "With severe brain injury, they are the shadows of the former person."

At the moment of impact, Jim Kane's brain went through a biological Armageddon. The attack by the concrete barricade -- and to the brain, it was an attack, a vicious, world-ending assault on its frontiers -- initiated a series of responses by the brain that would bring cataclysmic consequences. The battle was joined.

The brain, which floats in a pearly sea inside the skull, is both superbly well-defended and pathetically vulnerable, Senno said. "It's protected not only by the skull and the cerebral spinal fluid, which acts as a kind of shock absorber, but also by our eyes and ears, which alert us to danger, and by our hands, which we can hold out and protect ourselves with, and by muscle layers. The brain is protected -- but it's not protected from going 80 miles an hour and hitting the windshield or falling 20 feet."

When the brain is struck, its first response is edema: swelling. Just as other areas of the body swell if injured, brain tissue also swells. But unlike an ankle or arm, brain tissue has nowhere to go. It is blocked by the skull, which usually protects the brain but in the event of injury becomes its worst enemy.

Unable to go out, the swelling tissue begins to go in, pressing relentlessly on the capillaries threading their way through the brain, causing their collapse. That, in turn, cuts off the oxygen supply to the brain. The brain is an oxygen hog: It typically comprises less than 5 percent of an average woman or man's weight, but sucks up more than 25 percent of the body's oxygen. Without it, cells quickly begin to perish.

The wallop sustained by Kane's brain savaged its basic metabolism, the exquisitely balanced chemical and electrical system by which his 100 billion or so neurons went about their business of regularly making some 1,000 trillion connections to other neurons. As cells die -- some instantly, some over the next 24 hours or so -- from a traumatic blow, their death throes trigger the release of chemicals that destroy other neurons.

That is why, even though blows to different areas of the brain can result in different impairments -- a concept known as localization -- a brain injury anywhere affects the brain everywhere.

In the minutes following impact, the brain continues to swell, heading desperately for the only exit it can find: the foramen magnum, the hole at the base of the skull through which the spinal cord rises. Nestled next to the foramen magnum is the midbrain, home to the respiratory center -- which means that, as brain tissue squeezes its way down through the foramen magnum, it cuts off breathing.

As Kane lay by the highway, his brain was in chaos. The pressure was building, the cells screaming for oxygen, toxic chemicals flooding his neurons. He was unconscious, which occurs, researchers now believe, when the electrochemical signals passing between cells are disrupted by the lightning-storm of injury unleashed across the brain.

He was dying.

"For a brain-injured person," Senno said, "time is standing still." To Jim Kane, the world had ceased to exist; it flew away from him, ever fainter, ever further, and with it went the fundamental essence of a man unique in history -- just as every person is unique -- known as Jim Kane.

Once he was ferried by helicopter to Loyola Hospital's emergency room in Maywood, however, the world rushed back in. It descended with the bustle and din of modern trauma medicine: the formidable array of knowledge and technology that enables physicians to treat brain injury more effectively than ever before. This is the so-called "golden hour," the crucial interval just after injury during which severely brain-injured patients, once written off, now can be saved.

Incoming patients with brain injury are quickly evaluated according to the Glascow Coma Scale. It measures the depth of unconsciousness by assigning 1 to 4 points to responses such as eye opening and reactions to pain and to commands. Tallies of 3-8 indicate severe brain injury; 9-12, moderate; and 13-15, mild. The lowest possible score is 3.

Kane was judged at 3. The rankings are important because studies generally agree that the longer and deeper the coma, the less promising the recovery.

Within minutes, Kane's brain underwent a CT (computerized tomography) scan, a specialized X-ray that can reveal the location of bleeding and other damage.

Kane's injury was closed, meaning that the protective covering around the brain called the dura mater (Latin for "hard mother") had not been pierced, despite his fractured skull. Open injuries typically result from bullets or other penetrating wounds.

His brain was swelling so rapidly, with such dire consequences for brain tissue and its delicate filigree of neurons, that physicians made a drastic decision. They put Kane in a barbiturate coma, effectively anesthetizing his brain so that it would require less oxygen, a contingency employed in less than 5 percent of brain-injury cases. With the blood supply to Kane's brain already so catastrophically curtailed by the swelling, his brain would suffer less, physicians reasoned, if its requirements for blood also were reduced.

Brains are injured in two general ways. In one scenario, linear forces -- such as Kane's head striking the concrete barricade -- cause a coup-contrecoup injury, in which the brain hurtles forward against the skull, then hits the skull again in the opposite direction when the brain bounces backward. Often, the second injury -- the "contrecoup" -- is more damaging than the initial impact.

In another, the brain undergoes a violent wrenching, in effect a whiplash, resulting in what is called diffuse axonal injury. The white matter coating the axons -- spidery conduits whisking information from neuron to neuron -- is sheared.

Because it happens deep within cells, diffuse axonal injury doesn't show up on scans. Yet it can be even more devastating than coup-countrecoup, since it affects memory and other crucial cognitive functions. Many people who endure traumatic brain injury demonstrate signs of both: Their heads have struck solid objects as well as been violently whirled about.

Most likely, trauma patients with brain injuries have sustained other injuries too -- torn skin, fractured limbs, ruptured organs. Which should be taken care of first?

As a young intern, Senno recalled, he approached a patient with a bewildering host of serious complications. Senno has never forgotten the words of a senior physician who made an instant case for priorities:

"Save the brain."

Modern neuroscience was born with a brain injury.

In 1848, a railroad worker named Phineas Gage was planting explosives to clear land in Vermont for new track for the Rutland & Burlington line. Tamping the powder with an iron rod, he accidentally set off the dynamite. The rod blasted into his left cheek, shooting through his brain and rocketing out the top of his skull.

Gage survived and later seemed to be physically normal, but his personality was permanently altered. The hard-working, considerate man had turned into a lazy, ill-tempered lout. It was, his friends said, as if he had become a different person.

Through Gage's ordeal, researchers confirmed for the first time that injury to specific areas of the brain -- in Gage's case, the prefrontal cortices -- could produce specific deficits, and that the brain affects the entire constellation of human behavior: not just reasoning skills, but also the ability to empathize, weigh the consequences of actions, plan for the future.

These days, exploring the brain is big business. In late September, Microsoft co-founder Paul Allen pledged $100 million to establish the Allen Institute for Brain Research in Seattle. It will capitalize on a growing fascination with neuroscience, an accelerating awe that has transcended the scientific world and moved into the general public. Oliver Sacks, Steven Pinker and Antonio Damasio are among the brain researchers who have written best-selling books.

Now the challenge is to transfer the new knowledge about the brain from the laboratory into the lives of brain-injured people.

That exchange has been under way for at least a decade in emergency rooms. Thanks to a new understanding of brain biochemistry and new, more detailed imaging techniques such as MRIs (magnetic resonance imaging) and CT scans, along with procedures to monitor pressure in the wounded brain, physicians have made tremendous strides in treating severe brain injuries in those first critical hours.

Brain injury continues to be one of the primary routes through which breakthroughs in neuroscience occur, said Dr. John D. Corrigan, director of the Ohio Valley Center for Brain Injury Prevention and Rehabilitation at Ohio State University. "There is always a resurgence of study after a war. The Vietnam War was a milestone in the study of brain injury," as battlefield surgeons figured out under fire how best to deal with head wounds.

Some 20 percent of injuries to American soldiers in recent conflicts in Iraq and Afghanistan have included injury to the brain, according to the Defense and Veterans Brain Injury Center, created by the U.S. Congress after the Gulf War in acknowledgment that brain injury is not like other injuries. With more soldiers surviving their brain injuries, just as more people in the general population now survive, the need for specialized brain injury rehabilitation was clear.

Despite those record rates of survival, severe brain injury still can be lethal, killing at least 50,000 people annually. Recent victims have included Dr. Robert Atkins of low-carb diet fame, who slipped on the ice, and Washington Post publisher Katharine Graham , who tripped on a stone patio. The most ordinary of events -- a trip, a slip, a slide, a stumble, a fall -- can, if the brain is injured, bring about the most devastating of fates, including but not limited to death.

Dr. Hunt Batjer, chairman of the department of neurological surgery at Northwestern, who has performed emergency brain surgeries for more than 25 years, said that possibility of lost selfhood torments families. "They always say, `Will he be a fireman again? Will he be a lawyer again?' I have to tell them that it is completely impossible to know."

Founded in 1954, the RIC building at 345 E. Superior St. rises in the midst of other rectangles, other gray-flanked structures that take their earnest places in the giant tic-tac-toe board of downtown Chicago.

Along with treating patients for calamities such as spinal cord injury and amputation, the 20-story, 155-bed facility is a major research center, from the lab on the 14th floor where scientists study the complex mechanics of walking, to the 17th floor, where prosthetics and orthotics are created.

When the elevator opens on the 10th floor, you step off, pass through a set of glass double doors and enter a bright, open space with a cool white floor. Therapists stride quickly through the halls to fetch patients for their sessions. Phones trill at the circular reception desk. Patients arrive and depart, sometimes showing up initially on gurneys with eyes closed and bodies motionless and then, if they are fortunate, leaving by walking out under their own power -- making way for another patient, and then another and another.

"Unfortunately, we've had tremendous growth in brain injury," Senno said. "I'd rather be put out of business. I always tell people, `I'm good at what I do, but you don't want my services.'"

In August, the brain injury medicine unit moved from the fourth floor to the 10th, the culmination of a two-year, $5 million renovation to create one of the most innovative such units in the nation. Everything on the 10th floor is geared toward therapy and research, toward stimulating the brain to get back to business as quickly and efficiently as possible -- and then figuring out what worked and why.

"The philosophy in rehabilitation used to be, `Let's wait and see what happens,' " said Senno. "Now, we're capturing people early. We're aggressive."

Upon admission, patients are evaluated according to the Rancho Los Amigos Cognitive Scale, a 10-step road map through traumatic brain injury. Each patient goes through all 10 steps -- from "No Response" at level 1 to "Purposeful and Appropriate" at level 10, with stops along the way at levels such as 4, "Confused-Agitated," and 5, "Confused-Nonagitated" -- but always at her or his unique pace, remaining at steps for wildly varying lengths of time.

"Show me 5,000 brain injuries," Senno said, "and I'll tell you 5,000 stories." Every patient is different, yet from those singular experiences Senno and his colleagues try to extrapolate general principles about the brain, principles that may be subsequently applied in the rehabilitation of the next wave of injured brains -- the brain of a Jim Kane and other patients whose stays at RIC intersected with his.

The brain of Sarah Conrad, 24, a new bride and high school English teacher who loved Ernest Hemingway and the Chicago Cubs -- and whose car was hit broadside by another motorist on Mother's Day just minutes after she left her Plainfield home.

The brain of Nick Contri, 52, a funny, sarcastic man who could do anything with his hands, from creating metal sculpture to building kitchen cabinets -- and who slipped off a ladder and fell 25 feet onto a concrete parking lot in Munster, Ind.

The brain of John Sanders, 28, a dark-eyed charmer who had just made an offer on a house in Wildwood, Ill., after asking his girlfriend to marry him -- and who was thrown from his motorcycle in downtown Chicago.

The brain of Patrick Welch, 18, a recent high school graduate who delivered pizzas for spending money and dreamed of being a detective -- and who was struck by lightning while stepping out of a summer-school class at Illinois Valley Community College in Oglesby, Ill.

On the 10th floor, people such as Kane, Conrad, Contri, Sanders and Welch, all of whom were assessed at level 4 when they arrived except Conrad, who was at 5, had awakened hours or days or weeks after their accidents. They were restless and baffled, blinking in the fierce sunlight of a permanently altered world.

A world in which everything they did -- the most casual gesture -- suddenly constituted an excruciating ordeal.

A world in which physical activities taken for granted throughout their adult lives -- eating, talking, reading, breathing, going to the bathroom by themselves, writing their own name -- suddenly represented astonishingly difficult tasks.

Yet brain injury is not just a crisis of the body. Bodies heal, and they heal in uniform ways. "A broken leg is a broken leg," Ahmed said. "But the brain -- it is different for everyone. A brain injury is a lifetime diagnosis."

In the first days after he was settled into Room 1046, Jim Kane babbled. He ranted. He muttered about what he called "the Greek Mafia" coming to kill him.

He was a man who, if you asked him where he lived, would rattle off, "1304 N. 32nd Street," the apartment in Melrose Park where he had hadn't lived since 1978.

A man who ate a bar of soap that somebody left overnight on his bedside table because he didn't know what it was.

A man who went from an attentive and loving husband to a stranger screaming profanities at wife Jill and his therapists but who, when informed of what he'd just said, would cringe with shame and disbelief: "No, no, no -- I would never say those things. It wasn't me."

And it wasn't Jim Kane -- not the same Jim Kane, anyway, he had been on June 22. That Jim Kane disappeared into the black folds of a summer night.

In years past, a Jim Kane might have been written off, his brain injuries too severe, his prognosis too bleak. But not at RIC.

Not at a facility overseen by Senno, who knew something about long shots, about the power of persistent effort.

The 42-year-old physician was 9 years old when his family left Argentina to settle in New York. Because Senno and his sister spoke little English, they felt isolated and lonely, he recalled. Perhaps it was that ordeal -- being an outsider in an incomprehensible, seemingly closed world -- that pushed Senno into physical medicine and rehabilitation, a specialty often dismissed as the treatment of patients "other people don't want," he said frankly.

Senno can recount even less flattering nicknames for physical and rehabilitative medicine: the wastebasket specialty. The last car on the train. He and his sister, however, became physical medicine doctors, sometimes called physiatrists. She practices in the Boston area.

Senno's amiable, easygoing manner could fool you into forgetting the gravity of his daily duties. With his wire-rim glasses, thatch of thick black hair and slender build, Senno looks like a perpetual graduate student: intense, nimble, energetic, always ready to jump into any conversation about just about anything, from Harry Potter (news - web sites) to the best way to pattern the bricks in the back-yard patio he was creating. He favored herringbone, because it was the most difficult.

The 10th floor reflects Senno's personality, his blend of calm-minded realism and visionary fervor. He knows the devastation wrought by brain injury -- he can, like any doctor who specializes in the field, rattle off the grim statistics, the every-21-seconds stuff -- but he also believes science is making gains in what previously has been dismissed as a hopeless condition, an irrefutable doom.

Senno believes passionately in the concept of brain injury medicine -- in the notion that brain injury should be a specialty such as cardiology or nephrology. Only in the past few years, Senno said, have physicians begun to understand how central the brain is to everything else the body does during its healing. Every drug, every surgery, every therapy ought to be evaluated in light of what it does to the brain.

He dreams of the day when brain injury rehabilitation will echo brain injury emergency treatment, where survival rates have dramatically improved in the past decade. In an increasing number of emergency rooms, new specialists known as neuro-intensivists handle a severely brain-injured person's care. The brain injury takes precedence over whatever else is going on in the body.

"It used to be, if you brought someone in [to intensive care] and they didn't get better right away, that was it," said Edward J. Sylvester, author of "Back From the Brink: How Crises Spur Doctors to New Discoveries About the Brain" (Dana Press), a study of the neuro-intensivist movement that will be published in January. Yet with what physicians now know about brain injury, "we've bought the brain time."

The U. of C.'s Frank, one of only a handful of neuro-intensivists in the nation in the fledgling field, said brain-injury patients formerly were "parceled out among specialties. It's bad for patients because no one is in charge. It's bad for families because they don't have a single person to talk to. We [neuro-intensivists] control the whole body."

Senno hoped for a similar consolidation at the other end of the brain-injury spectrum: the rehabilitation end.

"This is where you live," Senno would say, grabbing the plastic brain model off the metal shelf in his office and jabbing a finger at the frontal lobes. "This is what makes you who you are."

By observing how the wounded brain struggles to resume its diverse and intricate functioning, scientists have gained promising insights into the brain's bedrock enigmas.

Dr. Donald G. Stein, neurology professor at Emory University School of Medicine and co-author of "Brain Repair" (1997), said, "It used to be that if you didn't see recovery [from brain injury] in the first six weeks, the attitude was, `Why bother?' You were nuts if you said the brain could repair itself. But we're learning that even years after an injury or stroke, you can promote plasticity," the brain's ability to change itself in response to its surroundings and experiences.

Despite promising research in brain injury medicine, however, the field still is ignored by many physicians and medical school administrators. Dr. Michael Pietrzak, executive director of the International Brain Injury Association, declared, "TBI [traumatic brain injury] hasn't been high on the priority list for physicians because everybody thought, `Well, there's nothing you can do.' "

Few medical school curricula include specific courses on brain injury. "I didn't have a single class on brain injury," said Senno, a 1994 graduate of the University of Illinois School of Medicine. "Not a class, not an hour. Zero."

Because the traditional thinking about brain-injured people was: Give up. A damaged brain is a damaged brain. Period.

Even if some recovery did occur, most physicians were convinced that it was bunched toward the front end of rehabilitation, then tailed off.

"There was a myth," Senno said, "that recovery from brain injury stopped after six months. Our research shows that it continues up to five years. If you can get someone to do this" -- he wiggled his right index finger -- "then after that, maybe they can pick up a pen."

And after that, maybe they can pick up the pieces of their lives.

Jill Kane was dozing on the couch in the living room of their Rolling Meadows home when she got the call early that Monday morning. She was in the car in minutes, rushing toward the hospital.

Jill, 45, is pretty and shy, with light blond hair that curves around her pale face and a soft, soothing voice. A voice that always seems to promise things would be better. A lullaby kind of voice.

Jim was big and sociable, a guy who might remind you of TV actor Jim Belushi. Fond of spaghetti dinners and kids and fixing things. He could fix anything, Jim could, from engines to toasters.

In family pictures, Jim's the one making the funny faces, with an arm slung around his wife's shoulder and a big, half-moon grin that crinkled the skin around his eyes. He had had a tough childhood, with constant money troubles in the family, and he had dropped out of high school to get a job and help with the bills. That was Jim: He always helped out.

They had been married 26 years. They dealt with life together, Jim and Jill, with the bad times and the frustrations, as well as the amazing, joyous things, such as the birth of their son 19 years ago. They bought a tidy little house. Jill worked for a company that made fasteners; Jim got a job repairing jewelry. For their 25th wedding anniversary, Jill surprised him with a shiny blue Honda Gold Wing motorcycle, almost 800 pounds of muscular chromium beauty. His dream.

Late on the next-to-last Sunday night in June, Jim decided the evening was just too gorgeous to miss. He loved motorcycles and had been riding since he was 16. He had owned five during their marriage. He and Jill often rode together, with him in control and her sitting behind him, hands cinched around his waist, cheek against his back. Jim was such a good driver, she said, that she could fall asleep on long rides. He was smooth and careful. He knew what he was doing.

Sometimes he wore a helmet. Sometimes he didn't.

This time, he didn't.

When Jill sent him off that night, did she have a premonition? A flicker of dark foreboding that she couldn't quite put her finger on?

No, Jill said. "It was just, `See you later, bye.' He wasn't his spunky self, and I hoped the ride would perk him up. It was such a beautiful night." Jim, she recalled, pulled on his black leather coat and gloves, just as he always did before a ride. "You wish," she says now, "that you'd known it was the last time." The last time, that is, that life would be normal.

The crash happened as Kane was returning from River Grove to Rolling Meadows, riding north along what is known as the 53 extension of I-290, near the line dividing DuPage and Cook Counties.

At the hospital, Jill was told that her husband probably wouldn't survive. His injuries were grievously severe: skull fracture, broken neck, bleeding in his brain. They handed her his wallet, which was covered in blood, and showed her to the waiting room.

When she finally was able to see him five hours later, she was stunned. His face was grotesquely swollen, his body sprouting lines to so many chiming monitors that he looked like part of a machine himself. Nobody knew. Nobody knew anything.

The days were not parceled into separate sunrises and sunsets but instead tended to blur into a single gray stretch of anguished waiting. Finally she was told that Jim was going to make it. He would remain in the drug-induced coma for 28 days, but he was going to make it.

His life was saved. She thanked God. His life was saved.

The real ordeal, however, was just beginning.

Every accident divides the world for the patient and their loved ones: Before and after. Sarah Conrad taught at Oswego High School and dreamed of her life with Pete -- and then her car was struck, and everything changed forever.

Nick Contri fixed heating and air conditioning units and loved going out to eat with his wife, Susan -- and then he fell off a ladder, and everything changed forever.

John Sanders had big plans for his girlfriend Cathy and his two small children -- and then he crashed his motorcycle, and everything changed forever.

Patrick Welch was a lanky, good-looking kid just a month past his high school graduation who was rebuilding a Chevy pickup in his parents' driveway -- and then he was struck by lightning, and everything changed forever.

Who, their families wondered, would emerge from the bundle of bandages and jungle of intravenous lines in which their husbands or sons or daughters or sweethearts were enmeshed?

Jill Kane knew who Jim Kane had been -- big, hearty, lovable Jim Kane. Funny, sweet Jim Kane. The guy who could fix anything. But who was her husband now? Who was this sullen stranger? You are your brain, she had been told over and over, and his brain has changed.

Who would he be?

Copyright © 2003 Chicago Tribune



BRAIN RESEARCH




Brain Area Identified That Weighs Rewards

Duke University
12/4/2003

By studying how monkeys choose to look at lighted targets for juice rewards, neurobiologists have identified a still-mysterious region of the cerebral cortex as an area that judges the value of rewards, and adjusts that value as circumstances change.

The finding adds a significant piece to the puzzle of how the brain is wired to make judgments, perhaps even moral judgments, about the outside world, said the researchers. The findings may also have implications for understanding a number of neurological disorders, said the scientists. Damage to the area the researchers studied -- called the posterior cingulate cortex -- has been linked to cognitive decline in Alzheimer's disease, as well as pathologies of stroke, obsessive-compulsive disorder, schizophrenia and spatial disorientation.

The researchers, led by Michael Platt, Ph.D., Duke University Medical Center assistant professor of neurobiology, published their findings in the Dec. 4, 2003, issue of the journal Neuron. Other authors on the paper were joint lead authors Allison McCoy of Duke and Justin Crowley, Ph.D., of Carnegie Mellon University; and Golnaz Haghighian and Heather Dean of Duke.

"Even though the posterior cingulate cortex is a large structure in the brain that is easily identifiable in all mammals, including humans, almost nothing was known about what it might do," said Platt. "Anatomical studies show that it is kind of a nexus of brain circuitry involved in motivational or emotional inputs from the limbic system. And it is strongly connected to structures involved in making decisions and generating responses. So, we theorized that it seemed to be important for somehow putting together the costs and benefits associated with different options in an animal's environment."

The researchers chose to study the role of the posterior cingulate cortex in making decisions about eye movement, because the visual system and the neural control of the eye muscles is very well understood, said Platt. So, they devised an experimental procedure in which monkeys would be asked to shift their gaze to one of a vast array of lighted diodes, in return for a fruit juice reward. At the same time, the researchers would monitor electrical activity in the neurons of the posterior cingulate cortex.

"We were trying to find those circuits that seem to associate motivational outcomes or emotional outcomes with the actions or the stimuli that produced them," said Platt. "So, once we had mapped the regions of the posterior cingulate cortex that responded to specific regions of visual space, we wanted to find out whether these neurons were representing how valuable movements to that region of space were.

"We manipulated how much fruit juice a monkey got for making particular eye movements, and we found a direct linear relationship between how strongly these neurons fired and the amount of fruit juice that was delivered," said Platt.

"And what really distinguishes the response of these neurons in the posterior cingulate cortex from other brain regions that respond to rewards is that these neurons not only respond just after the monkey makes an eye movement, but after the reward as well," he emphasized. "So, we're arguing that the first response represents a prediction of what the monkey expects the outcome to be, and the second response reflects what the outcome really was. And these are exactly the kinds of signals you would expect if the brain region was functioning to update and learn the value of different options."

Such a brain region would be determining what neurobiologists term a "reward-prediction" error -- a comparison of a predicted with an actual reward. To demonstrate the cingulate cortex was doing just this, the researchers performed trials in which they did not give the monkey a juice reward on every trial.

"When the monkey expected a reward and didn't get it, we found that these neurons would fire very strongly following the time when the monkey would normally expect a reward," Platt said. "So, we believe that firing meant that the neurons were registering a large reward-prediction error, and that this error would influence both neuronal activity and looking behavior on the next trial. Sure enough, it did," he said.

"And so, the posterior cingulate cortex seems to be -- at least, for visuospatial orienting -- putting together these signals of reward-prediction error with looking to the part of space that was connected with that reward," he concluded.

According to Platt, the latest findings could yield new insight into the function of the posterior cingulate cortex in neurological disorders. Since the region is known to be affected in Alzheimer's disease, obsessive-compulsive disorder and schizophrenia, further study could reveal underlying mechanisms for pathologies in this disease, he said.

"It has been observed that damage to this area can cause disturbances in spatial perception," Platt said. "Such damage can sometimes cause the kind of 'neglect' of a visual area that you see in stroke patients who don't perceive things on one side or the other of their visual field.

"One hypothesis that this research raises is that what's happening in such cases is that there's no motivational significance or emotional significance to that part of the visual world. It has become meaningless to the patient, because the posterior cingulate cortex is imbuing that part of the visual world with significance. Similarly, an inability to learn the motivational significance of new locations may be responsible for patients with degeneration of posterior cingulate cortex getting lost in new environments."

Also, said Platt, although he and his colleagues used eye movement as their experimental indicator of response, the posterior cingulate cortex has been linked to control of other muscle movements, suggesting that it plays a broader role in decision-making about actions.

Further studies will aim at understanding the neural machinery of the posterior cingulate cortex in greater detail, said Platt. For example, by precisely stimulating neurons in the region at different points in the judgment process, the researchers hope to determine whether they can affect the ability of a monkey to choose the right eye movements to receive a reward.

Also, he said, the researchers will seek to expand their understanding of the brain region, to determine whether it is involved in broader moral judgments and social reasoning—a possibility suggested by recent neuroimaging studies in humans.

"We'll have to be very clever in these experiments," said Platt. "After all, what is moral judgment for a monkey? So, we'll have to develop a way to measure whether a monkey perceives another violating a social norm, for example, and determine whether the posterior cingulate cortex is involved in that perception.



Brainwave fault explains slip-ups

Dr Avijit Datta, Medical Research Council

Scientists have found an explanation for those mornings where you put coffee on your cornflakes and the cat in the washing machine.

They say it is because of a change in the kind of brainwaves someone produces.

But the researchers, who presented their findings to the Physiological Society Conference, said the change could have more serious consequences.

They say it may have been a factor in accidents like the Chernobyl disaster.

Random test

A team from the Medical Research Council's cognitive and brain sciences unit in Cambridge examined brainwaves produced by people as they made mistakes.

It's the sort of mistakes you make especially when you're feeling tired or sleepy

Volunteers took part in a 10-minute repetitive action test that requires prolonged periods of concentration.

They were shown random numbers on computer screens roughly once every second. Every time a number appeared, they had to press the mouse button.

But if they saw the number three, they were told not to press the mouse.

Monitoring of the volunteer's brainwaves showed they were more likely to make a mistake following a drop in levels of a type of brainwave called P300.

Dr Avijit Datta, who led the research, said: "It's the sort of mistakes you make especially when you're feeling tired or sleepy, like accidentally putting coffee on your cornflakes instead of milk.

"But you have to remember that these sorts of mistakes have also been implicated in the Chernobyl disaster and the three-mile island accident."

'Poor performance'

"We knew from previous brain imaging which part of the brain is used when these types of mistakes are made, but we wanted to find out how the actual brainwaves themselves changed."

"We looked at P300 waves and we found that if they began to fall, we knew a mistake was likely to happen.

"And because of the nature of the test, we knew that it was not due to changes in reaction time, so the subjects were no faster or slower at performing, just more error-prone."

He added: "It happens about a third of a second after the stimulus. For example, if you were driving a car and a child stepped out in front of you, it would generate P300 waves a third of a second later.

"If you generate a big response, then your foot hits the brake. But if it's only a small response then a mistake is more likely."

He added: "We know from a previous study that these mistakes are often linked to the sleep cycle and internal body clock."

Researchers are now working with patients suffering from sleep disorders and children who suffer from attention disorders and poor performance at school.

They said it might even be possible to measure the brainwaves with simple electrode pads on the skull which could be used in a car to check if someone is liable to make a mistake while driving.




Scientists to discuss biological links to emotions

Dian Land

The slightest variation in the normal development of a child's brain may determine her temperament, potentially influencing whether she is sociable or reserved, high-strung or easygoing. Scientists suspect that more extreme deviations in brain development may lead to serious problems, including disorders such as hyperactivity, autism and schizophrenia.

Seven of the world's leading researchers will gather in Madison April 26-27 to discuss various aspects of this powerful cause and effect phenomenon. More than 300 professionals and students will be on hand for the event, the seventh annual Wisconsin Symposium on Emotion. This year's program centers on "The Developmental Neurobiology of Emotion and Emotional Disorders."

"We are discovering that many biological factors can contribute fundamentally to a person's emotional makeup. These factors may include lower activity in a specific area of the brain, elevated levels of certain hormones or a paucity of signal pathways between brain regions," says Ned Kalin, director of the Medical School's HealthEmotions Research Institute.

Understanding exactly how these factors influence individual emotional development can be crucial to the future development of potential treatments.

"Knowledge of these biological factors should also help us better identify who might be vulnerable to them, giving us greater opportunities to intervene early in life to treat problems before they become harmful," says Richard Davidson, HERI co-principal scientist.

The roster of symposium speakers includes: Jerome Kagan of Harvard University, who will speak on "Temperamental Contributions to the Variation in the Emotion of Uncertainty to Unfamiliar Events"; Judith Rapaport, National Institute of Mental Health, "Brain Development in Healthy, Hyperactive and Schizophrenic Children and Adolescents"; David Amaral, University of California-Davis, "The Amygdala, Social Behavior and Autism."

Elizabeth Gould, Princeton University, will speak on "The Effects of Stress on Hippocampal Development and Plasticity"; Huda Akil, University of Michigan, "Searching for the Biological Basis of Individual Differences in Emotional Reactivity"; Bradley S. Peterson, Yale University School of Medicine, "Developmental Neuroimaging Studies of Emotional and Self-Regulatory Disorders"; and Kalin, "The Neurobiology of Fear and the Anxious Endophenotype."

The HealthEmotions Research Institute has sponsored the annual symposium for four years. First started by Davidson in 1995, the symposia have come to attract international attention as the preeminent annual meeting on the neuroscience of emotion.

The meeting does more than serve as the setting for presentations on the latest findings by the finest minds in the field. An equally important objective is exposing students at all levels to the discipline.

"One aspect of the Institute's mission is to train a new generation of scientists equipped to address the complex, interdisciplinary relations involved in the study of emotions, a field that has tremendous potential for improving health," says Kalin. "We are committed to attracting the brightest new talent to the symposium. The Travel Award Program helps us do that."

The institute-sponsored program provides travel and accommodation support for 85 post-doctoral trainees, medical students, residents, and graduate and undergraduate students from the United States, Canada, United Kingdom and Europe.

UW-Madison students enrolled in psychology seminar #711, taught by Davidson and Hill Goldsmith, another HERI-affiliated faculty member, also highlight the educational emphasis of the symposium. All semester the students have been immersed in journal articles by the seven scientists who will be speaking at the meeting, forming a detailed picture of each presenter's area of expertise. Armed with this knowledge, the students will lead discussion sessions following each expert's talk and will be prepared to offer their own questions and observations.

The HealthEmotions Research Institute was created in 1996, one of the first research organizations of its kind at a major university. Its mission is to scientifically examine emotions and their far-ranging effects on health, particularly the impact of positive emotions.

Researchers at the Institute are striving to: identify brain mechanisms and chemicals that control and express positive emotions; describe factors that determine individual differences in the experience of positive emotions; establish how neural circuits involved in positive emotions are linked to the cardiovascular, immune, endocrine and gastrointestinal systems; and understand the degree to which systems involved in positive emotion and their links to physiological systems are malleable.




CHINESE MEDICINE




Acupuncture and Weight Loss: Relief for Anxiety and Cravings

By Andrea Pennington, M.D.
January 03, 2004

Irritability and anxiousness usually come hand in hand with trying to lose weight — not to mention those dastardly cravings! But a recent study in the journal Medical Acupunture suggests that the practice of ear acupuncture may help those trying to shed pounds. The study states that ear acupuncture (auriculotherapy), in conjunction with a reduced-calorie diet and regular exercise, can be effective in treating obesity. The randomized control trial found that acupuncture helped diminish cravings, curb appetite and ease anxiety.

Trial Results: 10 Pounds Lost in Eight Weeks With Acupuncture
Previous studies have shown that placing needles at certain points of the ear can decrease appetite and lipid levels, reduce anxiety and promote weight loss. The author of this recent study, Abraham Kuruvilla, M.D., conducted an eight-week trial with obese health-care workers from Pheonix, Ariz., to determine whether acupuncture coupled with exercise and a reduced-calorie diet would be more effective than diet and exercise alone.

The study participants were randomly assigned to either an acupuncture or a control group. The women in both groups weighed between 179 and 208 pounds and had body mass indices (BMI) of between 31 and 53, which qualified them as medically obese. (To find out your BMI, click here.) For eight weeks, both groups followed the same diet and exercise regimen, consuming approximately 2,000 calories a day (as prescribed by the American Diabetes Association) and took a 15-minute walk each day. The only difference was that the acupuncture group received ear acupuncture on a weekly basis.

After eight weeks, Dr. Kuruvilla and his team discovered that those who received acupuncture while decreasing their caloric intake and exercising daily lost an average of 10 pounds, while the control group (no acupuncture) lost an average of three pounds.

Decreased Appetite and No Anxiety
Interestingly, all of the acupuncture patients reported a decrease in appetite — which can really help when trying to stick to a new meal plan!

I have used acupuncture in weight management for some time now, and many of my clients describe that they feel less anxious and are better able to stick to their new diet regimens. Here's why:

How Ear Acupuncture Works The ear is considered a microsystem of the body. Every part of the body — including internal organs, the brain, bones, etc. — is said to be represented on the ear. It is suggested that we can contact the "energy" of the body and target specific organs by placing tiny needles in certain points of the ear.

In this study, Dr. Kuruvilla targeted points that correspond to the mouth, small intestine and stomach, all of which are critical for eating, digestion and absorption. Acupuncture was applied to the endocrine point, which helps the body metabolize food, and to a point called Shen Men (translated as "Spirit Gate") to help ease anxiety related to dieting. Dr. Kuruvilla found that "needling these points helps the body to function well against obesity."

Noting that 100 percent of the acupuncture participants reported a decrease in appetite and had a total weight loss nearly three times greater than controls suggests that when used with traditional weight-loss measures, acupuncture is quite effective. More studies must be conducted to determine whether patients maintain the weight loss over time.

For those who really struggle with irritability and cravings while dieting, acupuncture offers a wonderful addition to a weight-loss regimen.

After eight weeks, Dr. Kuruvilla and his team discovered that those who received acupuncture while decreasing their caloric intake and exercising daily lost an average of 10 pounds, while the control group (no acupuncture) lost an average of three pounds.—Dr. Andrea Pennington





Herbs for Improving Cognitive Function

In traditional practices of Ayurvedic and Chinese medicine, numerous plants have been used to treat cognitive disorders, including neurodegenerative diseases such as Alzheimer's disease (AD).

An ethnopharmacological approach has provided leads to identifying potential new drugs from plant sources, including those for cognitive disorders.

Many drugs currently available in Western medicine were originally isolated from plants, or are derived from templates of compounds isolated from plants. Some anticholinesterase (anti-ChE) alkaloids isolated from plants have been investigated for their potential in the treatment of AD, and are now in clinical use.

Galantamine, isolated from several plants including Lycoris radiata Herb., which was used in traditional Chinese medicine (TCM), is licensed in the United Kingdom for the treatment of mild to moderate AD.

Various other plant species have shown pharmacological activities relevant to the treatment of cognitive disorders, indicating potential for therapeutic use in disorders such as AD.

This article reviews some of the plants and their active constituents that have been used in traditional Ayurvedic medicine and TCM for their reputed cognitive-enhancing or antiageing effects.

Plants and their constituents with pharmacological activities that may be relevant for the treatment of cognitive disorders, including enhancement of cholinergic function in the central nervous system (CNS), anti-inflammatory and antioxidant activities, are discussed.



Acupuncture May Help Eye Allergies

Ocular allergy is a common complaint of allergy sufferers, many of whom may choose to use complementary and alternative medicine in the treatment of these symptoms. In this review, the researchers assess major complementary and alternative medicine modalities including herbal therapies, acupuncture, homeopathy, alternative immunotherapy and behavior modification for evidence of their effectiveness in the treatment of ocular allergy symptoms.

They found that certain herbs including Euphrasia officinalis, Petasites hybridus and Argemone mexicana have been evaluated in control studies in the treatment of ocular allergy. Honey is no more effective than placebo in the treatment of ocular allergy. Acupuncture used regularly has demonstrated some positive trends in ocular allergy sufferers. Homeopathy has shown conflicting results in the treatment of ocular allergy, while alternative forms of immunotherapy have been shown to develop immunologic tolerogenic effects in the control of the condition.

Several forms of complementary and alternative medicine have been studied for their effectiveness in treatment of ocular allergy symptoms. The researchers conclude that further research is needed to assess mechanisms of action and to establish practice guidelines for using these modalities.



EEG/ERP


Low-frequency stimulation of trigeminal afferents induces long-term depression of human sensory processing

Jens Ellrich and Anila Schorr
Brain Research, 2004, 996:2:255-258

Abstract

Electric low-frequency stimulation (LFS) of afferent nerve fibers reliably induces long-term depression (LTD) of synaptic transmission in vitro.

LTD is suggested to be one important mechanism of synaptic plasticity in the mammalian brain. The study demonstrated an LTD of evoked cortical potentials (-30%) and perception ratings (-25%) by noxious electric LFS of trigeminal afferents in man, indicating that LTD may also be involved in human synaptic plasticity.






Sensitivity of human EEG alpha band desynchronization to different working memory components and increasing levels of memory load

A. Stipacek, R. H. Grabner, C. Neuper, A. Fink and A. C. Neubauer,

Institute of Psychology, University of Graz, Universitaetsplatz 2/III, A-8010, Graz, Austria

November 2003.

Abstract

Event-related alpha band desynchronization is frequently used to analyze spatiotemporal cortical activation patterns during the performance of cognitive tasks. In the present paper the sensitivity of alpha band desynchronization to increasing levels of cognitive load and to different cognitive working memory components is investigated. A 27-channel electroencephalogram of 62 participants while solving (a) a short-term memory and (b) a working memory task (dual task), each with five levels of memory load, was analyzed. We found (a) a linearly increasing desynchronization in the upper alpha band with a