Analysis of cogwheel rigidity.
D004558:Electric Stimulation; D004576:Electromyography; D006801:Humans; D009119:Muscle Contraction; D009132:Muscles / Q000503:physiopathology*; D010300:Parkinson Disease / Q000503:physiopathology* / Q000601:surgery; D013238:Stereotaxic Techniques; D013788:Thalamus / Q000503:physiopathology*