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chronaxie
(redirected from chronaxies)

    Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.01 sec.
chronaxie /chro·nax·ie/ (kro´nak-se) chronaxy.
chro·nax·ie or chro·nax·y (krnks, krnk-)
n. pl. chro·nax·ies
The minimum interval of time necessary to electrically stimulate a muscle or nerve fiber, using twice the minimum current needed to elicit a threshold response.
chronaxie, chronaxy
the minimum time at which an electric current must flow at a voltage twice the rheobase to cause a muscle to contract.


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Because of the basic electrophysiology of nerve fibers, "induced exercise" necessitates use of relatively long pulse durations that will satisfy the prolonged chronaxies of denervated muscle fibers (pulse durations of at least 1 millisecond, but often 10-40 milliseconds and even up to 200 milliseconds are reported).
Evidence in practice by Fish, Dale R. / Physical Therapy
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