Brain

Researchers in the group "Alcoholism and drug addiction" of the University of Granada have shown that a hereditary lack of endorphin is a genetic predisposition to become addicted to alcohol.

Beta-endorphin is a kind of “morphine” released by the brain in response to several situations, such as pain. In this way, beta-endorphins can be considered “endogenous analgesics” to numb or dull pains.

Researchers from the European Molecular Biology Laboratory now reveal that the hypothalamus and its hormones are not purely vertebrate inventions, but have their evolutionary roots in marine, worm-like ancestors.

Hormones control growth, metabolism, reproduction and many other important biological processes. In humans, and all other vertebrates, the chemical signals are produced by specialized brain centers such as the hypothalamus and secreted into the blood stream that distributes them around the body.

The core of the gaming industry has always been young men with plenty of free time but increasingly investors and developers are trying to attract the casual gamers, including women, who have less time and infrequent contiguous blocks but are still interesting in being part of the gaming experience.

A new study from Bangladesh published online today in The Pediatric Infectious Disease Journal shows that routinely vaccinating infants against H. influenzae type b (Hib), a bacterium that causes deadly Hib pneumonia and meningitis, could save hundreds of thousands of children in Asia. Results showed that routine immunization of infants with a Hib conjugate vaccine prevented over one-third of life-threatening pneumonia cases and approximately 90% of Hib meningitis cases. A similar impact would be expected in other parts of the region.

Exercise has a similar effect to antidepressants on depression. This has been shown by previous research. Now Astrid Bjørnebekk at Karolinska Institutet has explained how this can happen: exercise stimulates the production of new brain cells.

In a series of scientific reports, she has searched for the underlying biological mechanisms that explain why exercise can be a form of therapy for depression and has also compared it with pharmacological treatment with an SSRI drug.

Penn State researchers did a study and found that web searchers who evaluated identical search-engine results preferred Yahoo first and Google second even though more claimed to use Google regularly. These results, they say, provide evidence that branding matters as much on the Internet as off and that there is "carry over" branding in effect too.

Researchers have discovered that calcium ions could play a crucial role in multiple sclerosis by activating enzymes that degrade the fatty sheath that insulates nerve fibers.

Learning exactly how the myelin sheath is degraded might enable scientists to determine how to halt disease progress and reverse damage by growing new myelin, said Ji-Xin Cheng, an assistant professor in Purdue University's Weldon School of Biomedical Engineering and Department of Chemistry.

Chemists from UCLA and the University of Florence in Italy may have solved an important mystery about a protein that plays a key role in a particular form of amyotrophic lateral sclerosis (ALS), also known as Lou Gehrig’s disease, a progressive, fatal neurodegenerative disorder that strikes without warning.

To understand the meaning of a conversation, kids automatically do what adults do —besides processing the meaning of words, they unconsciously “read” the expression on a person’s face and listen to their tone of voice, then integrate that information with the context at hand to discern meaning, be it humor, anger, irony or straightforwardness.

Exercise has a similar effect to antidepressants on depression. This has been shown by previous research. Now Astrid Bjørnebekk at Karolinska Institutet has explained how this can happen: exercise stimulates the production of new brain cells.

In a series of scientific reports, she has searched for the underlying biological mechanisms that explain why exercise can be a form of therapy for depression and has also compared it with pharmacological treatment with an SSRI drug.

Toddlers learn their first words better from people than from Teletubbies, according to new research at Wake Forest University.

The study was published in the June 21 issue of Media Psychology.

Children younger than 22 months may be entertained, but they do not learn words from the television program, said Marina Krcmar, associate professor of communication at Wake Forest and author of the study.

A unique study by researchers at the University of York and Hull York Medical School has confirmed a link between depression and low levels of folate, a vitamin which comes from vegetables.

In research published in the July edition of the Journal of Epidemiology and Community Health, the York team led by Dr Simon Gilbody, concluded that there was a link between depression and low folate levels, following a review of 11 previous studies involving 15,315 participants.

A synthetic version of a molecule found in the egg cells of the Northern Leopard frog (Rana pipiens) could provide the world with the first drug treatment for brain tumours.

Known as Amphinase, the molecule recognises the sugary coating found on a tumour cell and binds to its surface before invading the cell and inactivating the RNA it contains, causing the tumour to die.

Researchers at the University of Pennsylvania have demonstrated that gene therapy used to restore retinal activity to the blind also restores function to the brain’s visual center, a critical component of seeing.

The multi-institutional study led by Geoffrey K. Aguirre, assistant professor of neurology in Penn's School of Medicine, shows that gene therapy can improve retinal, visual-pathway and visual-cortex responses in animals born blind and has the potential to do the same in humans.

Researchers at the Picower Institute for Learning and Memory at MIT have, for the first time, reversed symptoms of mental retardation and autism in mice.

The mice were genetically manipulated to model Fragile X Syndrome (FXS), the leading inherited cause of mental retardation and the most common genetic cause of autism. The condition, tied to a mutated X chromosome gene called fragile X mental retardation 1 (FMR1) gene, causes mild learning disabilities to severe autism.