Steady-state Evoked Potentials to Amplitude Modulated Tones in the Monkey

Martin J. Burton Human Communication Research Centre & Department of Otolaryngology, University of Melbourne, Royal Victorian Eye & Ear Hospital, East Melbourne, Australia

Lawrence T. Cohen Human Communication Research Centre & Department of Otolaryngology, University of Melbourne, Royal Victorian Eye & Ear Hospital, East Melbourne, Australia

Field W. Rickards Deafness Studies Unit, Department of Educational Psychology & Special Education, University of Melbourne, Parkville, Australia

Kenneth I. McNally Human Communication Research Centre & Department of Otolaryngology, University of Melbourne, Royal Victorian Eye & Ear Hospital, East Melbourne, Australia

Graeme M. Clark Human Communication Research Centre & Department of Otolaryngology, University of Melbourne, Royal Victorian Eye & Ear Hospital, East Melbourne, Australia

Abstract

A frequency-specific, objective assessment of hearing thresholds is required for use in subjects unable to perform behavioural audiometry. One such method using steady-state evoked potentials (SSEPs) in response to amplitude-modulated tones was evaluated in an experimental animal, the macaque monkey. An amplitude-modulation frequency of 165 Hz was found to produce optimum response detection in the anaesthetised animal. Auditory thresholds determined by a computerised automatic response detection sytem accurately reflected behavioural thresholds previously described in this species.

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Steady-state Evoked Potentials to Amplitude Modulated Tones in the Monkey

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Steady-state Evoked Potentials to Amplitude Modulated Tones in the Monkey

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