Fear centre 'shrinks' in autism
A part of the brain associated with emotional learning and fear shrinks in people with autism, research suggests. Teenagers and young men with autism in the study who had the most severe social impairment were found to have smaller than normal amygdalae. The researchers from the University of Wisconsin suggested the amygdalae may shrink due to chronic stress caused by social fear in childhood. The study was published in the Archives of General Psychiatry.