Muscle Pain, Tendon Reflexes, and Muscular Coordination in Man.

Abstract
Summary Muscle pain induced by 40 to 60 contractions of the ischemic muscle of the hand causes a severe disturbance in the coordination of voluntary movements as shown by the handwriting and finger-nose tests. That reflex movements are likewise altered is shown by the fact that the triceps reflex disappears regularly when ischemic pain is produced in this muscle. However, neither ischemia nor ischemic pain involving the biceps has any influence on the triceps reflex. It is concluded that muscle pain interferes with muscular coordination through influences on spinal and possibly cortical centers.

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