Brain

MIAMI – (February 23, 2012) -- Sharks are among the most threatened of marine species worldwide due to unsustainable overfishing. Sharks are primarily killed for their fins alone, to fuel the growing demand for shark fin soup, which is an Asia delicacy. A new study by University of Miami (UM) scientists in the journal Marine Drugs has discovered high concentrations of BMAA in shark fins, a neurotoxin linked to neurodegenerative diseases in humans including Alzheimer's and Lou Gehrig Disease (ALS).

While boys generally do better than girls in science and math, some studies have found that girls do better in arithmetic. A new study published in Psychological Science, a journal of the Association for Psychological Science, finds that the advantage comes from girls' superior verbal skills.

San Diego, Calif. – The street drug commonly referred to as "bath salts" is one of a growing list of synthetic and unevenly regulated narcotics that are found across the United States and on the Internet. New research on this potent drug paints an alarming picture, revealing that bath salts pack a powerful double punch, producing combined effects similar to both methamphetamine (METH) and cocaine.

BOSTON, MA—Researchers at Brigham and Women's Hospital (BWH) have published findings that question the reliability of a new Centers for Medicare and Medicaid Services (CMS) quality measure. The study, "Assessment of Medicare's Imaging Efficiency Measure for Emergency Department Patients With Atraumatic Headache" finds that the CMS measure—an attempt to reduce computed tomography (CT) scans in emergency departments (ED)—does not accurately determine which hospitals are performing CT scans inappropriately.

WASHINGTON – Impulsive children with attention problems tend to play more video games, while kids in general who spend lots of time video gaming may also develop impulsivity and attention difficulties, according to new research published by the American Psychological Association.

Obesity can be a dangerous risk to our physical health, but according to a Tel Aviv University researcher, avoiding the gym can also take a toll on our mental health, leading to depression and greater burnout rates at work.

Researchers at the universities of Granada and Jaén, Spain, have discovered why recalling some items from memory reduces our ability to recall other related items. In the field of Psychology, this phenomenon is known as "Retrieval-Induced Forgetting" (RIF), and researchers have determined the cognitive process that causes this phenomenon and its duration.

A study in Spain shows that insecurity at work is directly and negatively linked to satisfaction in work and life, as well as affecting performance and commitment. Furthermore, the research reveals that the consequences of this insecurity are different according to the occupational group they work in.

A study led by Spanish psychologists has concluded that the feeling that one is going to lose their job worsens satisfaction levels in other areas of life, such as family, health, financial circumstances and the work-free time balance.

After we sense a threat, our brain center responsible for responding goes into gear, setting off a chain of biochemical reactions leading to the release of cortisol from the adrenal glands.

Dr. Gil Levkowitz and his team in the Molecular Cell Biology Department have now revealed a new kind of ON-OFF switch in the brain for regulating the production of a main biochemical signal from the brain that stimulates cortisol release in the body. This finding, which was recently published in Neuron, may be relevant to research into a number of stress-related neurological disorders.

COLUMBUS, Ohio – The more afraid a person is of a spider, the bigger that individual perceives the spider to be, new research suggests.

In the context of a fear of spiders, this warped perception doesn't necessarily interfere with daily living. But for individuals who are afraid of needles, for example, the conviction that needles are larger than they really are could lead people who fear injections to avoid getting the health care they need.

Tampa, FL (Feb. 22, 2012) -- A nicotinic drug approved for smoking cessation significantly improved the walking ability of patients suffering from an inherited form of ataxia, reports a new clinical study led by University of South Florida researchers.

The randomized controlled clinical trial investigated the effectiveness of varenicline (Chantix®) in treating spinocerebellar ataxia type 3, or SCA3. The findings were published online earlier this month in Neurology, the journal of the American Academy of Neuroscience.

Can animals' survival instincts shed additional light on what we know about human emotion? New York University neuroscientist Joseph LeDoux poses this question in outlining a pioneering theory, drawn from two decades of research, that could lead to a more comprehensive understanding of emotions in both humans and animals.

"Broken-hearted" isn't just a metaphor—social pain and physical pain have a lot in common, according to Naomi Eisenberger of the University of Califiornia-Los Angeles, the author of a new paper published in Current Directions in Psychological Science, a journal of the Association for Psychological Science. In the paper, she surveys recent research on the overlap between physical and social pain.

To address the faculty shortage problem, schools of nursing are reexamining how they provide clinical education to undergraduate students to find ways to use faculty resources more efficiently so they can maintain student enrollment and meet the future need for nurses.

Philadelphia, PA, February 22, 2012 – Mild traumatic brain injury (TBI) and posttraumatic stress disorder (PTSD) are cardinal injuries associated with combat stress, and TBI increases the risk of PTSD development. The reasons for this correlation have been unknown, in part because physical traumas often occur in highly emotional situations.

However, scientists at University of California at Los Angeles provide new evidence from an animal model of a mechanistic link underlying the association between TBI and PTSD-like conditions.