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These two side-by-side fMRI images show the right and left cerebral cortex, and the cerebellum. The left image is a control, and the right image is from a subject with an autism spectrum diagnosis. Within the images, the fusiform gyrus is marked within a red circle. Red/yellow signal shows brain areas that are significantly more active during perception of faces; signals in blue show areas more active during perception of non-face objects. There is a lack of face activation in the autistic subject, but average levels of non-face object activation.