title: Reflex mechanisms in Parkinsonian rigidity.
mesh_terms: D006801:Humans; D009046:Motor Neurons; D009119:Muscle Contraction; D009127:Muscle Rigidity / Q000503:physiopathology*; D009128:Muscle Spasticity / Q000503:physiopathology; D010300:Parkinson Disease / Q000503:physiopathology*; D012018:Reflex / Q000502:physiology*; D014202:Tremor / Q000503:physiopathology