A good network is important for brain activity

Speech, sensory perception, thought formation, decision-making processes and movement are complex tasks that the brain only masters when individual nerve cells (neurons) are well connected. Berlin neuroscientists have now discovered a molecular switch that regulates this networking of nerve cells.

The scientists from Charité — Universitätsmedizin Berlin, the NeuroCure Cluster of Excellence and the Max Delbrück Center for Molecular Medicine (MDC) have published their work in the journal Genes and Development.

The dendritic tree, a highly branched structure of neurons, plays an important role in these brain functions. The dendrites act like antennae to receive signals from other cells and send them on to the nerve cell body. Congenital neurological conditions, like mental retardation, are often associated with errors in dendritic tree development.

Marta Rosário's research team, in cooperation with Victor Tarabykin from Charité and Walter Birchmeier from MDC, has now discovered how this branching process is controlled during development. In living mice, it could be shown that the NOMA-GAP protein serves as a switch in this process. Maturing neurons produce this switch protein, which then starts a chain of signals in cells that leads to dendritic branching. A central element of this signal chain is a protein, called Cdc42. It plays an important role in the first developmental stages of neurons, but inhibits the branching of the dendritic tree in later developmental stages. When NOMA-GAP becomes active, it turns off Cdc42 allowing maturing neurons to form complex dendritic trees. The correct deployment of the switch protein and control of the signal chain regulated by Cdc42 are thus essential for the proper dendritic branching of neurons and thus for the development of the neocortex (the cerebral cortex) that steers sensory perception, memory, speech and movement, among other functions.

"Errors in this signal cascade lead to an incompletely developed dendritic tree. The result is a risk of mental limitations as signals in the brain cannot be adequately processed," explains Marta Rosário. "For us the study forms an important foundation for researching various conditions, like mental retardation, schizophrenia or depression, that will hopefully point out new therapeutic avenues."


Journal Reference:

  1. M. Rosario, S. Schuster, R. Juttner, S. Parthasarathy, V. Tarabykin, W. Birchmeier. Neocortical dendritic complexity is controlled during development by NOMA-GAP-dependent inhibition of Cdc42 and activation of cofilin. Genes & Development, 2012; DOI: 10.1101/gad.191593.112
 

Blogging relieves stress on new mothers

New mothers who read and write blogs may feel less alone than mothers who do not participate in a blogging community, according to family studies researchers.

"It looks like blogging might be helping these women as they transition into motherhood because they may begin to feel more connected to their extended family and friends, which leads them to feel more supported," said Brandon T. McDaniel, graduate student in human development and family studies at Penn State. "That potentially is going to spill out into other aspects of their well being, including their marital relationship with their partner, the ways that they're feeling about their parenting stress, and eventually into their levels of depression."

McDaniel and colleagues from Brigham Young University surveyed 157 new mothers about their media use and their well-being. The moms were all first-time parents with only one child under the age of 18 months — most much younger than this. The researchers report in the online version of Maternal and Child Health Journal that blogging had a positive impact on new mothers, but social networking — mainly Facebook and MySpace — did not seem to impact their well-being.

"We're not saying that those who end up feeling more supported all of a sudden no longer have stresses, they're still going to have those stressful moments you have as a parent," said McDaniel. "But because they're feeling more supported, their thoughts and their feelings about that stress might change, and they begin to feel less stressed about those things."

McDaniel pointed out several potential benefits for new mothers who blog, including giving moms both a way to connect with family and friends who do not live nearby and an outlet to use and showcase their hobbies and accomplishments, particularly for stay-at-home moms.

The researchers found that 61 percent of the mothers surveyed wrote their own blogs and 76 percent read blogs. Eighty-nine percent of the mothers who wrote their own blogs did so to "document personal experiences or share them with others," and 86 percent wanted to stay in touch with family and friends through the blog.

Because this is one of the first studies to look at the effects of participation in online communities on new mothers, McDaniel noted that there is not enough information collected yet to determine how or why blogging and social networking have markedly different impacts on new moms. However, this study demonstrated that mothers who blogged frequently show stronger connections to their family and friends.

The researchers saw a significant correlation between a strong connection to family and friends and increased feelings of social support, which in turn led to higher marital satisfaction, less marital conflict and less parenting stress. The mothers who experienced fewer feelings of parenting stress also had fewer feelings of depression.

Study participants completed an online survey that focused on two main subjects — their media use and their well-being. Mothers rated their feelings on scales corresponding to each item. Moms also tallied time spent on different activities throughout the day, including sleep, housework, childcare tasks and computer usage. They reported spending about three hours per day on the computer, using the Internet — behind only childcare, at almost nine hours a day, and sleep, at about seven hours per day.

McDaniel is continuing this line of research and exploring why blogging has the significant impact it does with new moms, while social networking may not always show the same effect. He emphasizes that this initial study is all correlational research, and one cannot establish causation from this study.

Sarah M. Coyne and Erin K. Holmes, assistant professors, School of Family Life, Brigham Young University, also worked on this research.


Journal Reference:

  1. Brandon T. McDaniel, Sarah M. Coyne, Erin K. Holmes. New Mothers and Media Use: Associations Between Blogging, Social Networking, and Maternal Well-Being. Maternal and Child Health Journal, 2011; DOI: 10.1007/s10995-011-0918-2
 

Who's stressed in the US? Adult stress levels from 1983-2009 described

Results show women report more stress, stress decreases with age, and the recent economic downturn mostly affected white, middle-aged men with college educations and full-time jobs.

Until now, comparing stress levels in individuals across the United States over time was not possible due to a lack of historical data that tracks stress using accepted comparable measures.

New research from Carnegie Mellon University's Sheldon Cohen and Denise Janicki-Deverts used telephone survey data from 1983 that polled 2,387 U.S. residents over the age of 18 and online surveys from 2006 and 2009 that polled 2,000 American adults each. All three surveys used the Perceived Stress Scale (PSS), a measure created by Cohen to assess the degree to which situations in life are perceived as stressful.

Cohen and Janicki-Deverts used the respondents' answers to determine if psychological stress is associated with gender, age, education, income, employment status and/or race and ethnicity, and if the distributions of stress across demographics were constant over the 26-year period.

Published in the Journal of Applied Social Psychology, the results show that women, individuals with lower income and those with less education reported more stress in all three surveys. They also show that as Americans age, they experience less stress and that retirees consistently report low levels of stress, indicating that retirement is not experienced as an adverse event.

"We know that stress contributes to poorer health practices, increased risk for disease, accelerated disease progression and increased mortality," said Cohen, the Robert E. Doherty Professor of Psychology within CMU's Dietrich College of Humanities and Social Sciences who is a leading expert on the relationship between stress and disease. "Differences in stress between demographics may be important markers of populations under increased risk for physical and psychological disorders."

Using the 2006 and 2009 surveys, Cohen and Janicki-Deverts found that those most negatively affected by the 2008-09 economic downturn were white, middle-aged men with college educations and full-time jobs. The authors suggested that this group may have had the most to lose since both their jobs and their savings were at risk.

Their results also showed between a 10 and 30 percent increase in stress in all the demographic categories over the 26 years between 1983 and 2009, however Cohen cautions against drawing the conclusion that Americans are more stressed today.

"It's hard to say if people are more stressed now than before because the first survey was conducted by phone and the last two were done online," Cohen said. "But, it's clear that stress is still very much present in Americans' lives, putting them at greater risk for many diseases such as cardiovascular, asthma and autoimmune disorders."


Journal Reference:

  1. Sheldon Cohen, Denise Janicki-Deverts. Who's Stressed? Distributions of Psychological Stress in the United States in Probability Samples from 1983, 2006, and 20091. Journal of Applied Social Psychology, 2012; 42 (6): 1320 DOI: 10.1111/j.1559-1816.2012.00900.x
 

Exercise and attitude may be thermostat for hot flashes

Attitude may play an important role in how exercise affects menopausal women, according to Penn State researchers, who identified two types of women — one experiences more hot flashes after physical activity, while the other experiences fewer.

"The most consistent factor that seemed to differentiate the two groups was perceived control over hot flashes," said Steriani Elavsky, assistant professor of kinesiology. "These women have ways of dealing with (hot flashes) and they believe they can control or cope with them in an effective way on a daily basis."

Women who experienced fewer hot flashes the day after participating in vigorous to moderate physical activity were more likely to be part of the group that felt they had control over their hot flashes. Women who had more hot flashes following exercise were likely to be those who felt they had very few ways of coping with their hot flashes, Elavsky and her colleagues report in a recent issue of Maturitas.

Elavsky suggested that cognitive behavioral therapy may help some women feel they have more control over their bodies and reactions to hot flashes.

The participants with fewer hot flashes the day after vigorous exercising were also less likely to experience anxiety and depression. However, women who had fewer hot flashes the day after only light or moderate physical activity had higher levels of pessimism and depression than others.

"The bottom line for research is that people need to look at individual differences," said Elavsky. "It's not enough anymore to do a study and look at overall impact of an exercise program on symptoms. It's very clear that we need to look at the different responses that women might have, and try to understand these individual differences more."

Elavsky and her colleagues followed 24 menopausal women for the length of one menstrual cycle, or for 30 days if they were no longer menstruating. Each woman used a personal digital assistant to record hot flashes and wore an accelerometer at the hip to track physical activity. The women in the study regularly had hot flashes before the start of the study, experiencing from five to 20 a day.

"The real-time reporting of symptoms and the objective measurement is a strength of the study," said Elavsky. "There aren't any studies out there that use both of these approaches. … To ask a woman to report a symptom when she's experiencing it is the most valid assessment."

At the beginning of the study, the participants completed evaluations that looked at their depressive symptoms, chronic stress, perceived control over hot flashes, and personality. They had a physical exam where researchers measured levels of reproductive hormones and body composition. Each woman served as her own control, therefore the data was analyzed for each separately.

If a woman experienced a hot flash during the observation period, she entered the event on the PDA, along with the severity and length of the event, where she was, if she had recently consumed a trigger, such as coffee, and included other situational information. At four random times throughout the day, the PDA prompted the woman to assess and record daily stressors and mood. At the end of the day, each completed a fifth assessment and looked retrospectively at how her day went and how well she coped with her hot flashes that day.

"I was surprised by how large the individual differences were," said Elavsky. "I was also surprised that the association was present in terms of statistically significant association only in a handful of women — and among those, there were two whose physical activity led to more hot flashes the next day and one that had the opposite. Maybe the reason why we don't see the associations in larger studies is because they cancel each other out."

Also working on this research were Peter C. M. Molenaar, professor of human development; Carol H. Gold, research associate for the Center of Healthy Aging; Nancy I. Williams, professor of kinesiology and physiology; and Keith R. Aronson, associate director of the Children, Youth and Families Consortium, all at Penn State.

The National Institute of Child Health and Human Development supported this research.


Journal Reference:

  1. Steriani Elavsky, Peter C.M. Molenaar, Carol H. Gold, Nancy I. Williams, Keith R. Aronson. Daily physical activity and menopausal hot flashes: Applying a novel within-person approach to demonstrate individual differences. Maturitas, 2012; 71 (3): 287 DOI: 10.1016/j.maturitas.2011.12.011
 

'uok?' Text messages can soothe the disconnected soul

NewsPsychology (Apr. 10, 2012) — Text messaging often gets a bad rap for contributing to illiteracy and high-risk behavior such as reckless driving. But a social welfare professor at the University of California, Berkeley, has found an upside to texting, especially for people who feel stressed out, isolated and alone.

Adrian Aguilera, a clinical psychologist who treats many low-income Latinos for depression and other mental disorders, said his patients report feeling more connected and cared for when they receive text messages asking them to track their moods, reflect on positive interactions, and take their prescribed medications.

“When I was in a difficult situation and I received a message, I felt much better. I felt cared for and supported. My mood even improved,” reported one Spanish-speaking patient in Aguilera’s cognitive behavior therapy group at San Francisco General Hospital.

The project began in 2010 when Aguilera developed a customized “Short Message Service (SMS)” intervention program, with the help of UCSF psychologist Ricardo Munoz, in which Aguilera’s patients were sent automated text messages prompting them to think and reply about their moods and responses to positive and negative daily interactions.

The psychologists published the results of the project last year in the journal, Professional Psychology: Research and Practice. Aguilera has since been awarded a $75,000 grant from the Robert Wood Johnson Foundation.

“We are harnessing a technology that people use in their everyday lives to improve mental health in low-income, under-served communities,” said Aguilera, whose passion for addressing mental health issues among the poor was sparked while growing up in a Mexican immigrant community in Chicago.

Recent statistics bear out Aguilera’s outreach strategy. The 2011 Pew Research Center’s Internet & American Life Project survey found that African American and Latino mobile phone owners send and receive more text messages than do Caucasians.

Of the 2,277 adult cell phone users surveyed by the Pew Foundation, the most active senders and receivers of text messages (at least 50 messages a day) were non-whites, earned incomes below $30,000 and did not graduate from high school.

Aguilera came up with the texting idea when he realized that many of his patients had difficulty applying the skills they learned in therapy to their daily lives, possibly because of the many stressors they routinely faced. They could not afford laptops, electronic tablets or smart phones, but most had a basic cellular phone and a prepaid monthly plan.

“The people I wanted to impact directly didn’t have as much access to computers and the Internet,” Aguilera said. “So I thought about using mobile phones to send text messages to remind them to practice the skills covered in therapy sessions.”

The feedback from patients offers new insight into the human need for regular contact or check-ins for mental health professionals, even if only through automated technology, Aguilera said.

While the text-messaging sessions are designed to last only a certain number of weeks, about 75 percent of the patients requested that they continue receiving the messages. When the program stopped for a week due to technical problems, some really noticed the difference.

“When it stopped, I missed it,” the patient reported. “My life is so crazy, I need a reminder to think about how I feel.”

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Story Source:

The above story is reprinted from materials provided by University of California – Berkeley. The original article was written by Yasmin Anwar.

Note: Materials may be edited for content and length. For further information, please contact the source cited above.


Journal Reference:

  1. Adrian Aguilera, Ricardo F. Muñoz. Text messaging as an adjunct to CBT in low-income populations: A usability and feasibility pilot study.. Professional Psychology: Research and Practice, 2011; 42 (6): 472 DOI: 10.1037/a0025499

Brain study: Adolescents' brains respond differently than adults' when anticipating rewards

— Teenagers are more susceptible to developing disorders like addiction and depression, according to a paper recently published by Pitt researchers in the Proceedings of the National Academy of Science.

The study was led by Bita Moghaddam, coauthor of the paper and a professor of neuroscience in Pitt's Kenneth P. Dietrich School of Arts and Sciences. She and coauthor David Sturman, a MD/PhD student in Pitt's Medical Scientist Training Program, compared the brain activity of adolescents and adults in rats involved in a task in which they anticipated a reward. The researchers found increased brain cell activity in the adolescent rats' brains in an unusual area: the dorsal striatum (DS) — a site commonly associated with habit formation, decision-making, and motivated learning. The adult rats' DS areas, on the other hand, did not become activated by an anticipated reward.

"The brain region traditionally associated with reward and motivation, called the nucleus accumbens, was activated similarly in adults and adolescents," said Moghaddam. "But the unique sensitivity of adolescent DS to reward anticipation indicates that, in this age group, reward can tap directly into a brain region that is critical for learning and habit formation."

Typically, researchers study the correlation between different behaviors of adolescents and adults. The Pitt team, however, used a method they call "behavioral clamping" to study if the brains of adolescents process the same behavior differently. To that end, the researchers implanted electrodes into different regions of rat adolescent and adult brains, allowing the researchers to study the reactions of both individual neurons and the sum of the neurons', or "population," activity.

The researchers' predictions proved accurate. Even though the behavior was the same for both adult and adolescent rats, the researchers observed age-related neural response differences that were especially dramatic in the DS during reward anticipation. This shows that not only is reward expectancy processed differently in an adolescent brain, but also it can affect brain regions directly responsible for decision-making and action selection.

"Adolescence is a time when the symptoms of most mental illnesses — such as schizophrenia and bipolar and eating disorders — are first manifested, so we believe that this is a critical period for preventing these illnesses," Moghaddam said. "A better understanding of how adolescent brain processes reward and decision-making is critical for understanding the basis of these vulnerabilities and designing prevention strategies."

The Pitt team will continue to compare adolescent and adult behavior, especially as it relates to stimulants — such as amphetamines — and their influence on brain activity.

The National Institute of Mental Health funded this project.


Journal Reference:

  1. D. A. Sturman, B. Moghaddam. Striatum processes reward differently in adolescents versus adults. Proceedings of the National Academy of Sciences, 2012; 109 (5): 1719 DOI: 10.1073/pnas.1114137109
 

One-in-five Americans experienced mental illness in past year

A new national report reveals that 45.9 million American adults aged 18 or older, or 20 percent of this age group, experienced mental illness in the past year. The rate of mental illness was more than twice as high among those aged 18 to 25 (29.9 percent) than among those aged 50 and older (14.3 percent). Adult women were also more likely than men to have experienced mental illness in the past year (23 percent versus 16.8 percent).

Mental illness among adults aged 18 or older is defined as having had a diagnosable mental, behavioral, or emotional disorder (excluding developmental and substance use disorders) in the past year, based on criteria specified in the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV; American Psychiatric Association [APA], 1994).

The Substance Abuse and Mental Health Services Administration's (SAMHSA) National Survey on Drug Use and Health also shows that 11.4 million adults (5 percent of the adult population) suffered from serious mental illness in the past year. Serious mental illness is defined as one that resulted in serious functional impairment, which substantially interfered with or limited one or more major life activities.

SAMHSA, through its strategic initiative on substance abuse and mental illness prevention and recovery, is working to assist states, territories, tribal governments, and communities to adopt evidence-based practices; deliver health education related to prevention; and establish effective policies, programs, and infrastructure to help address these problems. Throughout the Nation new programs are underway to strengthen the capacity of communities to better service the needs of those suffering from mental illness.

"Mental illnesses can be managed successfully, and people do recover," said SAMHSA Administrator Pamela S. Hyde. "Mental illness is not an isolated public health problem. Cardiovascular disease, diabetes, and obesity often co-exist with mental illness and treatment of the mental illness can reduce the effects of these disorders. The Obama Administration is working to promote the use of mental health services through health reform. People, families, and communities will benefit from increased access to mental health services."

The economic impact of mental illness in the United States is considerable — about $300 billion in 2002. According to the World Health Organization, mental illness accounts for more disability in developed countries than any other group of illnesses, including cancer and heart disease.

In terms of treatment statistics, the report indicates that about 4 in 10 people experiencing any mental illness in the past year (39.2 percent) received mental health services during that period. Among those experiencing serious mental illness, the rate of treatment was notably higher (60.8 percent).

The report also noted that an estimated 8.7 million American adults had serious thoughts of suicide in the past year — among them, 2.5 million made suicide plans and 1.1 million attempted suicide. Those in crisis or knowing someone they believe may be at immediate risk of attempting suicide are urged to call the National Suicide Prevention Lifeline 1-800-273-TALK (8255) or http:/www.suicidepreventionlifeline.org. This suicide prevention hotline network funded by SAMHSA provides immediate free and confidential crisis round-the-clock counseling to anyone in need throughout the country, everyday of the year.

According to the report, rates for substance dependence were far higher for those who had experienced either any mental illness or serious mental illness than for the adult population which had not experienced mental illness in the past year. Adults experiencing any mental illness in the past year were more than three times as likely to have met the criteria for substance dependence or abuse in that period than those who had not experienced mental illness in the past year (20 percent versus 6.1 percent). Those who had experienced serious mental illness in the past year had even a higher rate of substance dependence or abuse (25.2 percent). "These data underscore the importance of substance abuse treatment as well," said SAMHSA Administrator Pamela S. Hyde.

"Mental illness is a significant public health problem in itself, but also because it is associated with chronic medical diseases such as cardiovascular disease, diabetes, obesity, and cancer, as well as several risk behaviors including physical inactivity, smoking, excessive drinking, and insufficient sleep," said Ileana Arias, Ph.D., Principal Deputy Director of CDC. "Today's report issued by SAMHSA provides further evidence that we need to continue efforts to monitor levels of mental illness in the United States in order to effectively prevent this important public health problem and its negative impact on total health."

The report also has important findings regarding mental health issues among those aged 12 to 17. According to the report 1.9 million youth aged 12 to 17 (8 percent of this population) had experienced a major depressive episode in the past year. A major depressive episode is defined as a period of at least two weeks when a person experienced a depressed mood or loss of interest or pleasure in daily activities and had at least four of seven additional symptoms reflecting the criteria as described in the 4th edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-IV; American Psychiatric Association [APA], 1994).

In addition, the report finds that young people aged 12 to 17 who experienced a major depressive episode in the past year have more than twice the rate of past year illicit drug use (37.2 percent) as their counterparts who had not experienced a major depressive episode during that period (17.8 percent).

The 2010 National Survey on Drug Use and Health is a scientifically conducted annual survey of approximately 67,500 people throughout the country, aged 12 and older.

 

It's not solitaire: Brain activity differs when one plays against others

Researchers have found a way to study how our brains assess the behavior — and likely future actions — of others during competitive social interactions. Their study, described in a paper in the Proceedings of the National Academy of Sciences, is the first to use a computational approach to tease out differing patterns of brain activity during these interactions, the researchers report.

"When players compete against each other in a game, they try to make a mental model of the other person's intentions, what they're going to do and how they're going to play, so they can play strategically against them," said University of Illinois postdoctoral researcher Kyle Mathewson, who conducted the study as a doctoral student in the Beckman Institute with graduate student Lusha Zhu and economics professor and Beckman affiliate Ming Hsu, who now is at the University of California, Berkeley. "We were interested in how this process happens in the brain."

Previous studies have tended to consider only how one learns from the consequences of one's own actions, called reinforcement learning, Mathewson said. These studies have found heightened activity in the basal ganglia, a set of brain structures known to be involved in the control of muscle movements, goals and learning. Many of these structures signal via the neurotransmitter dopamine.

"That's been pretty well studied and it's been figured out that dopamine seems to carry the signal for learning about the outcome of our own actions," Mathewson said. "But how we learn from the actions of other people wasn't very well characterized."

Researchers call this type of learning "belief learning."

To better understand how the brain processes information in a competitive setting, the researchers used functional magnetic resonance imaging (fMRI) to track activity in the brains of participants while they played a competitive game, called a Patent Race, against other players. The goal of the game was to invest more than one's opponent in each round to win a prize (a patent worth considerably more than the amount wagered), while minimizing one's own losses (the amount wagered in each trial was lost). The fMRI tracked activity at the moment the player learned the outcome of the trial and how much his or her opponent had wagered.

A computational model evaluated the players' strategies and the outcomes of the trials to map the brain regions involved in each type of learning.

"Both types of learning were tracked by activity in the ventral striatum, which is part of the basal ganglia," Mathewson said. "That's traditionally known to be involved in reinforcement learning, so we were a little bit surprised to see that belief learning also was represented in that area."

Belief learning also spurred activity in the rostral anterior cingulate, a structure deep in the front of the brain. This region is known to be involved in error processing, regret and "learning with a more social and emotional flavor," Mathewson said.

The findings offer new insight into the workings of the brain as it is engaged in strategic thinking, Hsu said, and may aid the understanding of neuropsychiatric illnesses that undermine those processes.

"There are a number of mental disorders that affect the brain circuits implicated in our study," Hsu said. "These include schizophrenia, depression and Parkinson's disease. They all affect these dopaminergic regions in the frontal and striatal brain areas. So to the degree that we can better understand these ubiquitous social functions in strategic settings, it may help us understand how to characterize and, eventually, treat the social deficits that are symptoms of these diseases."


Journal Reference:

  1. L. Zhu, K. E. Mathewson, M. Hsu. Dissociable neural representations of reinforcement and belief prediction errors underlie strategic learning. Proceedings of the National Academy of Sciences, 2012; 109 (5): 1419 DOI: 10.1073/pnas.1116783109
 

Young children exposed to anesthesia multiple times show elevated rates of ADHD

 Mayo Clinic researchers have found that multiple exposures to anesthesia at a young age are associated with higher rates of attention-deficit/hyperactivity disorder (ADHD).

Children exposed to two or more anesthetics before age 3 had more than double the incidence of ADHD than children who had no exposure, says David Warner, M.D., a Mayo Clinic pediatric anesthesiologist and investigator on the observational study.

The findings are published in the Feb. 2 edition of Mayo Clinic Proceedings.

When basic science studies in the medical literature began to suggest anesthesia used in surgery causes changes in the brains of young animals, Dr. Warner and a group of researchers at Mayo Clinic took note.

"Those studies piqued our interest," Dr. Warner says. "We were skeptical that the findings in animals would correlate with kids, but it appears that it does."

The study utilized results of an existing epidemiological study that looked at educational records of children born between 1976 and 1982 in Rochester, Minn., and determined those who developed some form of learning disability or ADHD.

Among 341 cases of ADHD in those younger than 19, researchers traced medical records in the Rochester Epidemiology Project, a decades-long database of all patient care in Olmsted County, Minn., looking for exposure to anesthesia and surgery before age 3.

Children who had no exposure to anesthesia and surgery had ADHD at a rate of 7.3 percent. The rate after a single exposure to anesthesia and surgery was approximately the same. For children who had two or more exposures to anesthesia and surgery, the rate of ADHD was 17.9 percent, even after researchers adjusted for other factors, including gestational age, sex, birth weight and comorbid health conditions.

The results of the study, however, do not definitively mean that anesthesia causes ADHD, Dr. Warner says.

"This is an observational study," he says. "A wide range of other factors might be responsible for the higher frequency of ADHD in children with multiple exposures. The findings certainly do suggest that further investigation into this area is warranted, and investigators at Mayo Clinic and elsewhere are actively pursuing these studies."

The study was funded by the United States Food and Drug Administration, the Mayo Clinic Center for Translational Sciences Activities, the National Institutes of Health and the Rochester Epidemiology Project.


Journal Reference:

  1. Juraj Sprung, Randall P. Flick, Slavica K. Katusic, Robert C. Colligan, William J. Barbaresi, Katarina Bojanić, Tasha L. Welch, Michael D. Olson, Andrew C. Hanson, Darrell R. Schroeder, Robert T. Wilder, David O. Warner. Attention-Deficit/Hyperactivity Disorder After Early Exposure to Procedures Requiring General Anesthesia. Mayo Clinic Proceedings, 2012; 87 (2): 120 
 

Study to determine whether fish oil can help prevent psychiatric disorders

Researchers at Zucker Hillside Hospital's Recognition and Prevention (RAP) Program who have worked with teenagers at risk for serious mental illness for the past decade are now studying the effectiveness of Omega 3 fatty acids (fish oil) for treating psychiatric symptoms. This new study is a National Institute of Mental Health-funded randomized double-blind trial that was designed to test whether Omega-3 fatty acids improve clinical symptoms, and help adolescents and young adults (ages 12 to 25) who are at elevated risk for severe psychiatric disorders function better in school, work and other social environments.

"Of the 300 adolescents who have participated in the RAP Program, most have shown substantial improvement," noted Barbara Cornblatt, Ph.D., director of the Recognition and Prevention (RAP) Program and investigator at The Feinstein Institute for Medical Research. "If this study continues to show success, Omega 3 could offer a natural alternative to the range of medications and therapies now offered to RAP participants. Ultimately, the goal of the RAP Program is to intervene and prevent illness before symptoms get worse."

Omega 3 fatty acids are critical for normal brain function and they have been increasingly studied as potential treatments for medical and psychiatric disorders. The RAP Program study will randomly assign participants to either Omega 3 supplementation or to a placebo, and will compare the groups on key measures of symptoms and functioning after six months. Participants in both groups will be monitored closely on a monthly basis and compensation will be provided. All supplements are offered free of charge.