fMRI results: autism, intraparietal
In intraparietal sulcus, conversely, in this particular task we see supranormal activation in autism.

Activation scores in left intraparietal sulcus are significantly greater than normal, and in those subjects in our sample who have the most severe symptoms we also see a trend in right intraparietal sulcus.

We conceptualise this heightened response in intraparietal sulcus as a reflection of a compensatory effort to suppress the irrelevant signal that has made it through because of dysfunctional early filtering.

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`Physiological Studies of Attention in Autism: Implications for Autistic Cognition and Behaviour', Matthew Belmonte, 26 January 2002