title: Extrapyramidal rigidity. An electromyographic and pathophysioloical study of the tonic stretch and shortening reflexes.
mesh_terms: D000328:Adult; D000368:Aged; D003604:Czechoslovakia; D004576:Electromyography; D005116:Extrapyramidal Tracts / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009119:Muscle Contraction; D009470:Muscle Spindles / Q000503:physiopathology*; D009129:Muscle Tonus; D009132:Muscles / Q000294:innervation*; D009135:Muscular Diseases / Q000503:physiopathology; D010300:Parkinson Disease / Q000503:physiopathology; D011187:Posture; D012018:Reflex; D013035:Spasm / Q000503:physiopathology