Stereotypic Movement Disorder, also known as stereotypy habit disorder, is related to pervasive developmental disorder and autism spectrum disorder, and has symptoms including athetosis, clonus and muscular fasciculation. An important gene associated with Stereotypic Movement Disorder is MECP2 (Methyl-CpG Binding Protein 2), and among its related pathways/superpathways are Rett syndrome causing genes and Antipsychotics Pathway (Metabolic Side Effects), Pharmacodynamics. Affiliated tissues include eye and skin, and related phenotypes are nervous system and embryo