Abstract

The measurement of the low-frequency responses of inner hair cells is complicated by the fact that extracellular cochlear microphonic may be larger than the intracellular inner hair cell potential. A subtraction technique is proposed in which the extracellular and intracellular potentials are recorded sequentially and then subtracted to give an estimate of the true membrane potential. A theoretical analysis is presented which predicts that this calculated inner hair cell membrane potential is a more accurate measure of inner hair cell receptor current than the membrane potential measured with respect to a remote indifferent electrode.

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