Abstract
Electrical and Acoustical Auditory Brainstem Responses (ABRs) in a guinea pig model are compared in order to better define the characteristics of electrical stimulation. Also, the effects of the stimulating electrode location are being investigated because of its implications for cochlear implant design. The active electrodes are positioned in the basal and apical turns, while the return electrodes are placed in the eustachian tube and temporalis muscle. ABR morphology, wave latencies, and central conduction time are among the parameters studied. Electrode placement appears to have little effect on wave latencies or amplitudes. The acoustical and electrical wave morphologies differ. Latencies and central conduction time are shorter for electrical than for acoustical stimulation.
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