What Causes Autism?

Autism has no single cause. It was once thought to be a psychological disorder caused by traumatic experiences, leading to emotional and social withdrawal. Today, researchers believe that several genes, possibly in combination with environmental factors, may contribute to autism.

Some studies of individuals with autism have also shown abnormalities in several regions of the brain, including the cerebellum, amygdala, and hippocampus. While these findings are substantial, they require further study.