Brain

If you have a map, you can know where you are without knowing which way you are facing. If you have a compass, you can know which way you're facing without knowing where you are. Animals from ants to mice to humans use both kinds of information to reorient themselves in familiar places, but how they determine this information from environmental cues is not well understood.

A new article publishing online today in the Quarterly Journal of Medicine has reported the first case showing an association between exposure to head injuries in rugby union players and an increased risk in neurodegenerative disease.

Scientists at McMaster University have discovered how to make adult sensory neurons from human patients simply by having them roll up their sleeve and providing a blood sample.

Specifically, stem cell scientists at McMaster can now directly convert adult human blood cells to both central nervous system (brain and spinal cord) neurons as well as neurons in the peripheral nervous system (rest of the body) that are responsible for pain, temperature and itch perception. This means that how a person's nervous system cells react and respond to stimuli, can be determined from his blood.

Antidepressants are associated with better rates of treatment response and remission for women with postnatal depression, when compared to a placebo, according to a new systematic review by the Institute of Psychiatry, Psychology & Neuroscience (IoPPN) at King's College London.

A study has found that individual differences in brain structure could help to determine the risk for future drug addiction. The study found that occasional users who subsequently increased their drug use compared with those who did not, showed brain structural differences when they started using drugs.

Scientists from the University of Leeds, in collaboration with researchers from the Institute of Ophthalmology in London and Ghent University in Belgium, have discovered that mutations in the gene DRAM2 cause a new type of late-onset inherited blindness.

Cognitive impairment can occur in cancer patients who are treated with a variety of therapies, including radiation therapy, hormone therapy, and chemotherapy. After chemotherapy treatment it is commonly called "chemo brain." Signs of cognitive impairment include forgetfulness, inability to concentrate, problems recalling information, trouble multi-tasking and becoming slower at processing information. The number of people who experience cognitive problems following cancer therapy is broad, with an estimate range of 15 to 70 percent.

Smokers who are able to quit might actually be hard-wired for success, according to a study from Duke Medicine.

The study, published in Neuropsychopharmacology, showed greater connectivity among certain brain regions in people who successfully quit smoking compared to those who tried and failed.

A study of 2,377 children with autism, their parents and siblings has revealed novel insights into the genetics of the condition.

Scientists at The Scripps Research Institute (TSRI) have discovered that a brain protein has a key role in controlling binge drinking in animal models. They found that deleting the gene for this protein in mice ramped up alcohol consumption and prevented the brain from signaling the rewarding properties of alcohol.

Supplementing the plant-based Mediterranean diet with antioxidant-rich extra virgin olive oil or mixed nuts was associated with improved cognitive function in a study of older adults in Spain but the authors warn more investigation is needed, according to an article published online by JAMA Internal Medicine.

Myopia or short-sightedness is becoming more common across Europe, according to a new study led by King's College London. The meta-analysis of findings from 15 studies by the European Eye Epidemiology Consortium found that around a quarter of the European population is short-sighted but it is nearly twice as common in younger people, with almost half (47 per cent) of the group aged between 25 and 29 years affected.

Your genes may influence how sensitive you are to emotional information, according to new research by a UBC neuroscientist. The study, recently published in The Journal of Neuroscience, found that carriers of a certain genetic variation perceived positive and negative images more vividly, and had heightened activity in certain brain regions.

"People really do see the world differently," says lead author Rebecca Todd, a professor in UBC's Department of Psychology. "For people with this gene variation, the emotionally relevant things in the world stand out much more."

During the short, dreary days of winter, do you feel tired and oversleep, tend to be depressed and irritable and have trouble concentrating, but once spring comes you feel just fine?

If so, you may be one of the 4 to 6 percent of the American public who suffer from seasonal affective disorder (SAD), a type of depression that occurs during the same season each year.

Just as most cameras now have an autostabilization feature to compensate for movement during picture taking, our eyes execute an imperceptible reflex that prevents our vision from blurring when we, or our field of vision, are in motion. But before the reflex can work, the wirelike projections, or axons, of specialized nerve cells must find their way from the retina to the correct part of the brain during embryonic development.