The reflex muscle spasm in the chronic arthritis--a factor for determining the joint position.
D000758:Anesthesia; D001168:Arthritis / Q000503:physiopathology*; D002908:Chronic Disease; D004576:Electromyography; D006801:Humans; D007596:Joints / Q000294:innervation*; D009046:Motor Neurons / Q000503:physiopathology; D009120:Muscle Cramp / Q000503:physiopathology*; D012018:Reflex