Study: Bigger Brains in Certain Types of Autism

A new study adds to an increasing amount of evidence suggesting a link between brain size and autism.
Researchers at the Mind Institute at the University of California at Davis have found that children with a certain type of autism, called regressive autism, generally have larger brains than children without the disorder, and for kids with early onset autism.
A number of recent studies have found a link between brain size and autism, confirming suspicions long held by many autism experts that the disorder is linked to neurological growth and development. But the authors of this latest study, David G. Amaral and Christine Wu Nordahl, say their findings, published in the Proceedings of the National Academy of Sciences, indicate that the causes of autism may vary among children with different types of the disorder.