| Persistence of past stimulations: storing sounds within the inner ear. | |
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MedLine Citation:
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PMID: 21463575 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Tones cause vibrations within the hearing organ. Conventionally, these vibrations are thought to reflect the input and therefore end with the stimulus. However, previous recordings of otoacoustic emissions and cochlear microphonic potentials suggest that the organ of Corti does continue to move after the end of a tone. These after-vibrations are characterized here through recordings of basilar membrane motion and hair cell extracellular receptor potentials in living anesthetized guinea pigs. We show that after-vibrations depend on the level and frequency of the stimulus, as well as on the sensitivity of the ear. Even a minor loss of hearing sensitivity caused a sharp reduction in after-vibration amplitude and duration. Mathematical models suggest that after-vibrations are driven by energy added into organ of Corti motion after the end of an acoustic stimulus. The possible importance of after-vibrations for psychophysical phenomena such as forward masking and gap detection are discussed. |
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Authors:
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Jiefu Zheng; Sripriya Ramamoorthy; Tianying Ren; Wenxuan He; Dingjun Zha; Fangyi Chen; Anna Magnusson; Alfred L Nuttall; Anders Fridberger |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Biophysical journal Volume: 100 ISSN: 1542-0086 ISO Abbreviation: Biophys. J. Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-04-05 Completed Date: 2011-07-12 Revised Date: 2012-04-06 |
Medline Journal Info:
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Nlm Unique ID: 0370626 Medline TA: Biophys J Country: United States |
Other Details:
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Languages: eng Pagination: 1627-34 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 Biophysical Society. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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Oregon Hearing Research Center, Department of Otolaryngology, Oregon Health & Science University, Portland, Oregon, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation* Action Potentials / physiology Animals Basilar Membrane / physiology Ear, Inner / physiology* Guinea Pigs Motion Organ of Corti / physiology Sound* Time Factors Vibration |
| Grant Support | |
ID/Acronym/Agency:
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DC00141/DC/NIDCD NIH HHS; R01 DC004554/DC/NIDCD NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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