| Ossicular motion related to middle ear transmission delay in gerbil. | |
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MedLine Citation:
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PMID: 20696229 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The middle ear transmits sound efficiently from the air in the ear canal (EC) to the fluid filled cochlea. In gerbil, middle ear transmission produces a constant pressure gain between the EC and the cochlea of ∼25 dB from 2 to 40 kHz, and a delay-like phase corresponding to a ∼25-30 μs delay. The mechanisms by which the air-born signal is collected and delivered to the cochlea are not thoroughly understood, and the source of the delay is controversial. We investigated these issues by observing ossicular motion along a single line of sight, roughly parallel to the EC and perpendicular to the stapes footplate. Measurements were made at the umbo, the long process of the manubrium, across the malleus-incus joint, at the long process of the incus, and the stapes head. While the overall delay between EC pressure and stapes velocity was fairly constant with frequency, subcomponents of the delay were frequency dependent. Up to ∼17 kHz, most of the overall delay was between the EC and umbo with a much smaller contribution along the ossicles, whereas in the range from ∼17 to 30 kHz, more of the overall delay was along the ossicles. |
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Authors:
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Ombeline de La Rochefoucauld; Puja Kachroo; Elizabeth S Olson |
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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 Date: 2010-08-07 |
Journal Detail:
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Title: Hearing research Volume: 270 ISSN: 1878-5891 ISO Abbreviation: Hear. Res. Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2010-12-06 Completed Date: 2011-03-21 Revised Date: 2011-12-21 |
Medline Journal Info:
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Nlm Unique ID: 7900445 Medline TA: Hear Res Country: Netherlands |
Other Details:
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Languages: eng Pagination: 158-72 Citation Subset: IM |
Copyright Information:
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Copyright © 2010 Elsevier B.V. All rights reserved. |
Affiliation:
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Columbia University, New York, NY 10032, USA. odelarochefoucauld@gmail.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Animals Biomechanics Ear Ossicles / physiology* Ear, Middle / physiology* Gerbillinae Hearing* Mechanotransduction, Cellular* Pressure Time Factors |
| Grant Support | |
ID/Acronym/Agency:
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DC003130/DC/NIDCD NIH HHS; R01 DC003130-16/DC/NIDCD NIH HHS; R01 DC003130-18/DC/NIDCD NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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