Time-varying auditory gain control in response to double-pulse stimuli in harbour porpoises is not mediated by a stapedial reflex
Echolocating animals reduce their output level and hearing sensitivity with decreasing echo delays, presumably to stabilize the perceived echo intensity during target approaches. In bats, this variation in hearing sensitivity is formed by a call-induced stapedial reflex that tapers off over time aft...
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The Company of Biologists
2017
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Online Access: | https://doi.org/10.1242/bio.021469 https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Time-varying-auditory-gain-control-in-response/991005546010407891 https://researchportal.murdoch.edu.au/view/delivery/61MUN_INST/12137332300007891/13137367310007891 |
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ftmurdochunivall:oai:alma.61MUN_INST:11137332310007891 2024-09-09T19:43:50+00:00 Time-varying auditory gain control in response to double-pulse stimuli in harbour porpoises is not mediated by a stapedial reflex Schrøder, A.E.M. Beedholm, K. Madsen, P.T. 2017 pdf https://doi.org/10.1242/bio.021469 https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Time-varying-auditory-gain-control-in-response/991005546010407891 https://researchportal.murdoch.edu.au/view/delivery/61MUN_INST/12137332300007891/13137367310007891 eng eng The Company of Biologists ispartof: Biology Open spage 525 epage 529 issue 4 vol 6 doi:10.1242/bio.021469 WOS:000399531000014 2046-6390 http://dx.doi.org/10.1242/bio.021469 991005546010407891 https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Time-varying-auditory-gain-control-in-response/991005546010407891 https://researchportal.murdoch.edu.au/view/delivery/61MUN_INST/12137332300007891/13137367310007891 alma:61MUN_INST/bibs/991005546010407891 Open CC BY V4.0 text Article 2017 ftmurdochunivall https://doi.org/10.1242/bio.021469 2024-08-15T00:52:48Z Echolocating animals reduce their output level and hearing sensitivity with decreasing echo delays, presumably to stabilize the perceived echo intensity during target approaches. In bats, this variation in hearing sensitivity is formed by a call-induced stapedial reflex that tapers off over time after the call. Here, we test the hypothesis that a similar mechanism exists in toothed whales by subjecting a trained harbour porpoise to a series of double sound pulses varying in delay and frequency, while measuring the magnitudes of the evoked auditory brainstem responses (ABRs). We find that the recovery of the ABR to the second pulse is frequency dependent, and that a stapedial reflex therefore cannot account for the reduced hearing sensitivity at short pulse delays. We propose that toothed whale auditory time-varying gain control during echolocation is not enabled by the middle ear as in bats, but rather by frequency-dependent mechanisms such as forward masking and perhaps higher-order control of efferent feedback to the outer hair cells. Article in Journal/Newspaper Harbour porpoise toothed whale toothed whales Murdoch University Research Portal Biology Open |
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Murdoch University Research Portal |
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English |
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Echolocating animals reduce their output level and hearing sensitivity with decreasing echo delays, presumably to stabilize the perceived echo intensity during target approaches. In bats, this variation in hearing sensitivity is formed by a call-induced stapedial reflex that tapers off over time after the call. Here, we test the hypothesis that a similar mechanism exists in toothed whales by subjecting a trained harbour porpoise to a series of double sound pulses varying in delay and frequency, while measuring the magnitudes of the evoked auditory brainstem responses (ABRs). We find that the recovery of the ABR to the second pulse is frequency dependent, and that a stapedial reflex therefore cannot account for the reduced hearing sensitivity at short pulse delays. We propose that toothed whale auditory time-varying gain control during echolocation is not enabled by the middle ear as in bats, but rather by frequency-dependent mechanisms such as forward masking and perhaps higher-order control of efferent feedback to the outer hair cells. |
format |
Article in Journal/Newspaper |
author |
Schrøder, A.E.M. Beedholm, K. Madsen, P.T. |
spellingShingle |
Schrøder, A.E.M. Beedholm, K. Madsen, P.T. Time-varying auditory gain control in response to double-pulse stimuli in harbour porpoises is not mediated by a stapedial reflex |
author_facet |
Schrøder, A.E.M. Beedholm, K. Madsen, P.T. |
author_sort |
Schrøder, A.E.M. |
title |
Time-varying auditory gain control in response to double-pulse stimuli in harbour porpoises is not mediated by a stapedial reflex |
title_short |
Time-varying auditory gain control in response to double-pulse stimuli in harbour porpoises is not mediated by a stapedial reflex |
title_full |
Time-varying auditory gain control in response to double-pulse stimuli in harbour porpoises is not mediated by a stapedial reflex |
title_fullStr |
Time-varying auditory gain control in response to double-pulse stimuli in harbour porpoises is not mediated by a stapedial reflex |
title_full_unstemmed |
Time-varying auditory gain control in response to double-pulse stimuli in harbour porpoises is not mediated by a stapedial reflex |
title_sort |
time-varying auditory gain control in response to double-pulse stimuli in harbour porpoises is not mediated by a stapedial reflex |
publisher |
The Company of Biologists |
publishDate |
2017 |
url |
https://doi.org/10.1242/bio.021469 https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Time-varying-auditory-gain-control-in-response/991005546010407891 https://researchportal.murdoch.edu.au/view/delivery/61MUN_INST/12137332300007891/13137367310007891 |
genre |
Harbour porpoise toothed whale toothed whales |
genre_facet |
Harbour porpoise toothed whale toothed whales |
op_relation |
ispartof: Biology Open spage 525 epage 529 issue 4 vol 6 doi:10.1242/bio.021469 WOS:000399531000014 2046-6390 http://dx.doi.org/10.1242/bio.021469 991005546010407891 https://researchportal.murdoch.edu.au/esploro/outputs/journalArticle/Time-varying-auditory-gain-control-in-response/991005546010407891 https://researchportal.murdoch.edu.au/view/delivery/61MUN_INST/12137332300007891/13137367310007891 alma:61MUN_INST/bibs/991005546010407891 |
op_rights |
Open CC BY V4.0 |
op_doi |
https://doi.org/10.1242/bio.021469 |
container_title |
Biology Open |
_version_ |
1809913510826606592 |