title: Parkinsonism--two types of activation.
mesh_terms: D006225:Hand; D006801:Humans; D008297:Male; D009127:Muscle Rigidity / Q000209:etiology / Q000503:physiopathology; D009129:Muscle Tonus; D010300:Parkinson Disease / Q000209:etiology* / Q000503:physiopathology / Q000601:surgery; D005082:Physical Exertion; D013238:Stereotaxic Techniques; D014202:Tremor; D014953:Wrist