Estimating mechanical responses to pulsatile electrical stimulation of the cochlea
AuthorMcAnally, Ken I.; Brown, Mel; Clark, Graeme M.
Source TitleHearing Research
University of Melbourne Author/sClark, Graeme
Document TypeJournal Article
CitationsMcAnally, K. I., Brown, M., & Clark, G. M. (1997). Estimating mechanical responses to pulsatile electrical stimulation of the cochlea. Hearing Research, 106, 146-153.
Access StatusThis item is currently not available from this repository
Publisher’s permission requested and denied.
This study estimated the mechanical response of the cochlea to pulsatile electrical stimulation of the scala tympani of the cat. The auditory nerve compound action potential evoked by an acoustic probe was forward-masked by a train of charge-balanced biphasic current pulses. Masking as a function of probe frequency reflected the excitation pattern of the response to the masker and resembled the spectrum of the electrical stimulus. Both pulse rate and pulse width influenced the degree of masking. The vibration of a region of the basilar membrane was estimated by recording the local cochlear microphonic evoked by biphasic pulses. The amplitude of the cochlear microphonic was proportional to the amplitude of the spectral component of the electrical stimulus to which the local cochlear microphonic was tuned. These results are consistent with the generation of a mechanical response to the electrical stimulus.
Keywordscochlear implant; auditory nerve; hair cell; transduction; compound action potential; masking
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- Graeme Clark Collection