The study of catatonia in Autism Spectrum Disorders is a novel and controversial topic. Catatonia is a motor disorder characterized by stereotypy, rigidity, mutism, and posturing. These motor signs are also characteristic of autism. The interest in the relation between autism and catatonia stems from clinical observations that autistic and catatonic symptoms overlap, that some people with autism develop full-blown catatonia, and that anti-catatonic treatments bring relief in some of those patients.

Catatonia in Autism Spectrum Disorders explores the question of if the two...