Sky diving and base jumping are not for everyone. However, for certain people, the more risk and adrenaline involved in an activity, the better! What draws some people to daredevil behavior while others shy away from it? Psychologists Jane E. Joseph, Xun Liu, Yang Jiang and Thomas H. Kelly from the University of Kentucky, along with Donald Lyman of Purdue University were interested in testing how the brains of sensation-seekers differ from those of us who avoid risky behavior.
Brain
Researchers at NYU Langone Medical Center have discovered a novel way to stimulate the innate immune system of mice with Alzheimer's disease (AD) - leading to reduced amyloid deposits and the prevention of Alzheimer's disease related pathology - without causing toxic side effects. The study entitled "Induction of Toll-like Receptor 9 Signaling as a Method for Ameliorating Alzheimer's Disease Related Pathology" was published in The Journal of Neuroscience.
Roughly 10 million years ago, a major genetic change occurred in a common ancestor of gorillas, chimpanzees, and humans. Segments of DNA in its genome began to form duplicate copies at a greater rate than in the past, creating an instability that persists in the genome of modern humans and contributes to diseases like autism and schizophrenia. But that gene duplication also may be responsible for a genetic flexibility that has resulted in some uniquely human characteristics.
PHILADELPHIA – If you ever argued with your mother when she told you to get some sleep after studying for an exam instead of pulling an all-nighter, you owe her an apology, because it turns out she's right. And now, scientists are beginning to understand why.
In research published this week in Neuron, Marcos Frank, PhD, Assistant Professor of Neuroscience, at the University of Pennsylvania School of Medicine, postdoctoral researcher Sara Aton, PhD, and colleagues describe for the first time how cellular changes in the sleeping brain promote the formation of memories.
Study results to be published in the April 2009 issue of the Journal of the American Geriatrics Society show that computerized brain exercises can improve memory and lead to faster thinking.
Prior studies have shown that older adults perform better on cognitive tests after repeatedly practicing those tests, but this large-scale study is the first to link a commercially available software program to improvement on unaffiliated standard measures of memory and to better performance on everyday tasks.
When someone speaks to you, do you see what they are saying? We tend to think of speech as being something we hear, but recent studies suggest that we use a variety of senses for speech perception - that the brain treats speech as something we hear, see and even feel. In a new report in Current Directions in Psychological Science, a journal of the Association for Psychological Science, psychologist Lawrence Rosenblum describes research examining how our different senses blend together to help us perceive speech.
Great advances have been made in treating blockages in the arteries of the brain using angioplasty to widen the narrowed artery and a stent to hold the artery open. However, in-stent stenosis, or a re-blockage of the artery within the stent due to scar tissue or blood clots, is estimated to occur in up to 30 percent of patients and can cause a stroke or death.
Why do people gamble if they know that the house always wins? Researchers at the University of Cambridge argue that near-misses, where the gambler narrowly misses out on the jackpot, may provide part of the answer.
Although the gambler loses their bet on a near-miss, where the slot machine reel stops one position from the 'payline', the researchers found that near-miss outcomes make people want to carry on gambling and caused brain activity in areas that normally process winning money.
A new study demonstrates that when gambling, almost winning promotes significant recruitment of win-related circuitry within the brain and enhances the motivation to gamble. The research, published by Cell Press in the February 12th issue of the journal Neuron, provides insight into why gambling is so attractive and may shed light on why some individuals develop a compulsion to gamble.
New research provides strong support for the idea that one of the key functions of sleep is the consolidation of memories. The study, published by Cell Press in the February 12th issue of the journal Neuron, provides fascinating insight into the cellular mechanisms that govern the sleep-dependent consolidation of experiences that occur while we are awake.
SALT LAKE CITY—Unraveling the genetics of social behavior and cognitive abilities, researchers at the University of Utah and the Salk Institute for Biological Studies have traced the role of two genes,GTF2I and GTF2IRD, in a rare genetic disorder known as Williams Syndrome.
Their results, published in the Feb. 9, 2009, online edition of the American Journal of Medical Genetics, suggest that GTF2IRD1 contributes to visual-spatial performance while GTF2I plays a role in social behavior. These findings illuminate the most complex aspects of being human.
Madison, WI, February 9, 2009 -- The rangelands of Iran have one of the world's longest history of agriculture development, with a deep tradition of technological developments and knowledge of the soil that has produced centuries of fertile crops. Currently, however, new pressures to feed an increasing population of humans and livestock in the region has taken its toll on the land, as evidence now suggests that the soil is rapidly degrading.
Every day we are confronted with positive and negative statements. By combining the new, incoming information with what we already know, we are usually able to figure out if the statement is true or false. Previous research has suggested that including negative words, such as "not," in the middle of a sentence can throw off our brains and make it more difficult to understand.
WINSTON-SALEM, N.C. – Results of a recent study conducted by researchers at Wake Forest University Baptist Medical Center and colleagues show that cognitive functioning abilities drop as average blood sugar levels rise in people with type 2 diabetes.
The study appears in this month's issue of Diabetes Care.
The underlying sense of being in control of our own actions is challenged by new research from UCL (University College London) which demonstrates that the choices we make internally are weak and easily overridden compared to when we are told which choice to make.