Air pollution, even at moderate levels, has long been recognized as a factor in raising the risk of stroke. A new study suggests that long-term exposure can cause damage to brain structures and impair cognitive function in middle-aged and older adults.
New study examines thousands of brains from 2 decades of research to reveal differences between male & female brain structure. "It is important to note that we only investigated sex differences in brain structure, so ...cannot infer anything about how this relates to behaviour or brain function." "Although these ...clear sex differences in brain structure may reflect an environmental or social factor, from other studies we know that biological influences are also important."
Heavy marijuana use as a teenager may cause changes in brain structure that resemble schizophrenia, new research shows. Teens who were heavy marijuana users—smoking it daily for about three years—had abnormal changes in their brain structures related to working memory and performed poorly on memory tasks, a new study shows.