title: Studying muscle tone.
mesh_terms: D000818:Animals; D002415:Cats; D002490:Central Nervous System / Q000503:physiopathology; D005121:Extremities; D006801:Humans; D009119:Muscle Contraction; D009470:Muscle Spindles / Q000503:physiopathology; D009129:Muscle Tonus; D013035:Spasm / Q000503:physiopathology