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Definition : Instruments for measuring the minimal duration current flow necessary to stimulate a threshold muscle contraction (i.e., chronaxy). The measurements are typically made at double the voltage necessary to produce a twitch in the muscle (i.e., rheobase). Chronaximeters are used mainly to establish the state of innervation of a muscle, especially when nerve lesions are suspected.

Entry Terms : "Chronomyometers"

UMDC code : 10833

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