this comprises the features of ( a ) movement disorders secondary to neurological diseases affecting the extrapyramidal motor system , such as : athetosis , chorea , dystonia , hemiballismus , myoclonus , tremor , tics and spasm , ( b ) drug induced movement disorders , such as : akathisia , akinesia , hyperkinesia , dyskinesias , extrapyramidal syndrome , and tardive dyskinesia , and ( c ) abnormal movements in psychiatric disorders , such as : mannerism , stereotyped behaviour and psychomotor retardation .
C0008489
chorea
C0026650
movement disorders