Washington, March 19 : An Indian-origin researcher at the Massachusetts Institute of Technology (MIT) has shed some light on why autistic people fail to recognise faces as effectively as their normal counterparts, by studying why they often fail to recognise faces in photographic negatives.

Pawan Sinha, an associate professor of Brain and Cognitive Sciences, says that a person''s eyes appear darker than the forehead and cheeks in nearly every normal lighting condition.

Washington, Mar 18 : The purported benefits of fish for such things as cardiovascular health have been overstated and have put increased pressure on global fish stocks, according to a new research.

Researchers at St. Michael’s Hospital and the University of Toronto teamed up with scientists at the University of British Columbia’s Fisheries Centre and author Farley Mowat to closely examine the effects of health claims with regard to seafood.

For years, international agencies concerned with health and nutrition have promoted seafood consumption.

Washington, Mar 18 : Collagen injections can be beneficial for patients who still suffer from stress urinary incontinence (SUI) even after urethral or periurethral surgery, according to a study.

Collagen has been used to treat SUI because its injection into the tissue surrounding the urethra tightens the urethral sphincter, and stops urine from leaking.

"Patients with persistent or recurrent incontinence often do not wish to undergo another surgery," said Dr. Philippe Zimmern, professor of urology and the study's lead author.

"The collagen injection is also a good alternative for those who cannot afford recovery time from surgery or are too medically unfit or frail to undergo a second surgical intervention," he added.

Washington, Mar 18 : Researchers at University of Washington have discovered a brain abnormality linked to attention deficit hyperactivity and conduct disorders (ADHD) in boys.

During the study, the researchers focused on two brain areas-the striatum and anterior cingulate cortex.

The striatal region is a network of structures in the mid brain that motivates people to engage in pleasurable or rewarding behaviour.

The anterior cingulate is higher in the brain, and normally activates when an expected reward stops.

Varanasi, Mar 18 : Stevia or honey leaf, known for its antidote properties against diabetes, is becoming popular as a cure for the disease in Varanasi.

Also known by the names of sweet leaf or sugar leaf, these leaves provide cure in many health disorders.

Washington, Mar 18 : Just five minutes of sustained physical activity can help prevent childhood obesity, according to a study.

Researchers from Queen's University in Ontario, Canada, have revealed that several bursts of exercise that last five minutes or more may be better for preventing childhood obesity than are intermittent physical activity sessions lasting four minutes or less throughout the day.