Emotional stress caused by last year's tsunami caused a part of some survivors' brains to shrink, according to scientists in Japan who grasped a unique chance to study the neurological effects of trauma.
The number of people with dementia is expected to almost double to 65.7 million people by 2030, according to a World Health Organization (WHO) report published on Wednesday.
Suicide rates for female teens and pre-teens in Canada rose over the past few decades even though the overall number of youths who took their own lives was dropping, according to a Canadian study that covered nearly 30 years.
Researchers said on Wednesday they had found three more genes implicated in autism and turned up some evidence to explain why the disorder occurs more frequently among children of older parents.
Scientists have discovered how electroconvulsive or electric shock therapy -- a controversial but effective treatment -- acts on the brains of severely depressed people and say the finding could help improve diagnosis and treatment of mental illness.
Men who smoke experience greater mental declines over time than men who never smoked, but the same link does not appear among women, said a British study published in the United States on Monday.
Children who develop autism already show signs of different brain responses in their first year of life, scientists said on Thursday in a study that may in the future help doctors diagnose the disorder earlier.
People who challenge their brains throughout their lifetimes -- through reading, writing and playing games -- are less likely to develop protein deposits in the brain linked with Alzheimer's, U.S. researchers said on Monday.
One in five adults in the United States, or nearly 50 million people, suffered mental illnesses in the past year, with women and young adults suffering disproportionately, a government report released on Thursday found.
Confined to a wheelchair, in constant pain and unable to bathe without help, a 63-year-old grandmother has forced the issue of assisted suicide into Canadian courts for the third time in two decades.