title: Pathophysiology of Parkinson's disease.
mesh_terms: D006801:Humans; D009046:Motor Neurons / Q000503:physiopathology*; D009129:Muscle Tonus; D009132:Muscles / Q000503:physiopathology*; D010300:Parkinson Disease / Q000503:physiopathology*; D012023:Reflex, Monosynaptic; D014202:Tremor