MRI Brain Scans at the University of North Carolina have found differences in the size of the amygdala in the brains of children diagnosed with Autism (as compared to brains of children who do not have this diagnosis). By the age of two, the amygdala is already about 13% larger and then apparently stops growing. The question now is whether children are born with Autism or whether it develops sometime during the first two years of life? The amygdala (and there are two of them in the limbic area of the brain) helps an individual to process faces and emotions.
http://www.cnn.com/2009/HEALTH/05/04/autism.brain.amygdala/index.html
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