Chronobiological aspects of stereotypy.
An area of research concerned with the temporal structure of stereotypic behavior, namely, the chronobiology of stereotypy, was reviewed. Nine studies in which investigators examined the long-term temporal structure of stereotypy of mentally retarded individuals were reviewed. Seven of them indicated that stereotypy occurs in a rhythmic pattern over time. The origins of these patterns were related to both exogenous and endogenous factors, such as staff and activity changes, metabolic functions, and the existence of a rest-activity cycle.
D001143:Arousal; D002940:Circadian Rhythm; D006801:Humans; D008607:Intellectual Disability / Q000523:psychology*; D009043:Motor Activity; D010507:Periodicity; D012931:Social Environment; D013239:Stereotyped Behavior