ABSTRACT
Autism spectrum disorders are conditions usually presenting in early childhood characterized by marked impairments in social interaction and communication (1) and by extremely restricted and odd interests and activities (2). For at least a subgroup of individuals, movement disorders are salient manifestations of the condition. For example, anomalous motions are prominent presenting (3) and persisting signs (4-7) in some persons with autism spectrum disorders (8). Movement disorders occur in people with autism spectrum disorders both as manifestations of the underlying conditions and as adverse effects of therapeutic interventions (9).
