Human Phenotype Ontology entry HP_0000733 (Motor stereotypy) is use of the same abnormal action in response to certain triggers or at random. They may be used as a way to regulate one's internal state but must otherwise have no apparent functional purpose. Also known as: Abnormal repetitive mannerism, Repetitive behavior, Repetitive behaviour Stereotypic behaviour, Repetitive movements, Repetitive, stereotypic behavior, Stereotyped, Stereotyped behavior, Stereotyped behaviors.