Electrically evoked whole‐nerve action potentials: Data from human cochlear implant users
作者:
Carolyn J. Brown,
Paul J. Abbas,
Bruce Gantz,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1990)
卷期:
Volume 88,
issue 3
页码: 1385-1391
ISSN:0001-4966
年代: 1990
DOI:10.1121/1.399716
出版商: Acoustical Society of America
数据来源: AIP
摘要:
This study describes a method for recording the electrically evoked, whole‐nerve action potential (EAP) in users of the Ineraid cochlear implant. The method is an adaptation of one originally used by Charlet de Sauvageetal. [J. Acoust. Soc. Am.73, 615–627 (1983)] in guinea pigs. The response, recorded from 11 subjects, consists of a single negative peak that occurs with a latency of approximately 0.4 ms. EAP input/output functions are steeply sloping and monotonic. Response amplitudes ranging up to 160 μV have been recorded. Slope of the EAP input/output function correlates modestly (approximately 0.6–0.69) with results of tests measuring word recognition skills. The refractory properties of the auditory nerve were also assessed. Differences across subjects were found in the rate of recovery from the refractory state. These findings imply that there may be difference across subjects in the accuracy with which rapid temporal cues can be coded at the level of the auditory nerve. Reasonably strong correlations (approximately 0.74–0.85) have been found between the magnitude of the slope of these recovery curves and performance on tests of word recognition.
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