title: Parkinsonian rigidity: the first hundred-and-one years 1817-1918.
mesh_terms: D001480:Basal Ganglia Diseases / Q000503:physiopathology; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009127:Muscle Rigidity / Q000503:physiopathology; D009128:Muscle Spasticity / Q000266:history / Q000503:physiopathology; D009129:Muscle Tonus; D010300:Parkinson Disease / Q000266:history* / Q000503:physiopathology; D010301:Parkinson Disease, Postencephalitic / Q000266:history* / Q000503:physiopathology