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Human auditory nerve compound action potentials and long latency responses

Record type: Article

The compound action potential (CAP) is followed by a long latency response (LLR), attributable to the post-auricular musculature. The LLR to one pulse may overlap with the CAP to a subsequent one, contributing to the clinically observed reduction in CAP at high pulse rates. Objectives. To measure refractory and other influences on CAPs in humans and guinea pigs. Materials and methods. CAPs were obtained from humans using trans-tympanic and extra-tympanic electrocochleography and from anaesthetized guinea pigs. Stimuli were single pulses presented at a slow rate, pairs of pulses, and 100 ms pulse trains where the inter-pulse interval alternated between 4 and 6 ms. Results. For single pulses, the CAP shape was similar across species. For pairs of pulses, the CAP to the second pulse was smaller than that to the first, and decreased with increasing inter-pulse interval in a way that was similar across species. For pulse trains, CAPs were observed in response to each pulse in the train for the guinea pigs, but not for humans. For both filtered and unfiltered single pulses, there was a large LLR in humans, but not in guinea pigs, with peaks at latencies of 10–12 and 20–25 ms. Posture affected the LLR in a way consistent with the post-auricular response


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Citation

Mahendran, S., Bleeck, S., Winter, I.M., Baguley, D.M., Axon, P.R. and Carlyon, R.P. (2007) Human auditory nerve compound action potentials and long latency responses Acta Oto-Laryngologica, 127, (12), pp. 1273-1282. (doi:10.1080/00016480701253086).

More information

Published date: 2007
Keywords: electrocochleography, post-auricular response, adaptation
Organisations: Human Sciences Group

Identifiers

Local EPrints ID: 43456
URI: http://eprints.soton.ac.uk/id/eprint/43456
ISSN: 0001-6489
PURE UUID: fe6f3792-b3c4-4863-802f-d85f5b024dd5
ORCID for S. Bleeck: ORCID iD orcid.org/0000-0003-4378-3394

Catalogue record

Date deposited: 25 Jan 2007
Last modified: 17 Jul 2017 15:18

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Contributors

Author: S. Mahendran
Author: S. Bleeck ORCID iD
Author: I.M. Winter
Author: D.M. Baguley
Author: P.R. Axon
Author: R.P. Carlyon

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