chronaxy


chronaxie

 [kro´nak-se] the minimum time at which an electric current must flow at a voltage twice the rheobase to cause a muscle to contract. In a curve" >strength-duration curve for muscle stimulation, it is the width" >pulse width at a voltage twice that at the rheobase.

chro·nax·ie

(krō'nak-sē), A measurement of excitability of nervous or muscular tissue; the shortest duration of an effective electrical stimulus having a strength equal to twice the minimum strength required for excitation. Synonym(s): chronaxia, chronaxis, chronaxy [G. chronos, time, + axia, value]