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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.
[G. chronos, time, + axia, value]
chronaxy/chro·naxy/ (kro´nak-se) the minimum time an electric current must flow at a voltage twice the rheobase to cause a muscle to contract.
Etymology: Gk, chronos, time, axia, value
(in electroneuromyography) a measure of the shortest duration of an electrical stimulus needed to excite nerve or muscle tissue.
the minimum time at which an electric current must flow at a voltage twice the rheobase to cause a muscle to contract.