title: Physiological observations in Sydenham's chorea.
abstract: Involuntary movements in a patient with Sydenham's chorea were usually characterised by bursts of EMG activity lasting more than 100 ms, occurring asynchronously in antagonist muscles. The "hung-up" knee jerk was a choreic movement induced by the tendon tap. Exaggerated voluntary movements were produced with EMG burst longer than normal.
mesh_terms: D002648:Child; D002819:Chorea / Q000188:drug therapy / Q000503:physiopathology*; D004576:Electromyography; D005260:Female; D006220:Haloperidol / Q000627:therapeutic use; D006801:Humans; D007866:Leg; D009132:Muscles / Q000503:physiopathology
chemical_list: D006220:Haloperidol