clo's ure c

(CCC or CaCC), the momentary u. of a muscle under the influence of the negative pole when an electrical circuit is established. cath'odal o'pening t. (COC or CaOC), the momentary c. of a muscle under the influence of the negative pole when the circuit is broken. Dupuytren's t., see Dupuytren. front-tap u., c of the calf muscles when the anterior surface of the leg is struck, hour'gla c, constriction of the middle portion of a hollow organ, such as the stomach or the gravid uterus, myotat'ic c, (i) reflex c. of a muscle induced by its pa ive stretching; (2) tendon reflex, paradox'ical c, a tonic contraction of the anterior tibial muscles when a sudden pa ive dorsal flexion of the foot is made. Westphal's c, paradoxical c.