This brain structure may grow too fast in babies who develop autism

A brain structure called the amygdala grows too fast in babies who are diagnosed with autism by age 2, a new study suggests.

The study researchers found that this overgrowth occurs between 6 and 12 months of age, before children are typically diagnosed with autism. The findings, published Friday (March 25) in The American Journal of Psychiatrysuggest that therapies for children at high risk of autism may have the best chance of working if they start in infancy.

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