The illustration above links to an NIMH fact sheet on autism spectrum disorders. In the illustration, you can see the amygdala, hippocampus, and corpus striatum. Remember that both the left and right hemispheres contain each of these structures, which are mirror images of each other. The pair of structures called the corpus striata has, in the past, been referred to as the basal ganglia. The corpus striata play a key role in generating obsessions and compulsions. We will discuss the corpus striata structures in more detail in Parts 2 and 3 of
