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Minimal basilar membrane motion in low-frequency hearing
Linköpings universitet, Medicinska fakulteten. Linköpings universitet, Institutionen för klinisk och experimentell medicin, Avdelningen för cellbiologi.
Indian Institute Technology, India.
Imperial Coll, England.
Oregon Health and Science University, OR 97239 USA.
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2016 (engelsk)Inngår i: Proceedings of the National Academy of Sciences of the United States of America, ISSN 0027-8424, E-ISSN 1091-6490, Vol. 113, nr 30, s. E4304-E4310Artikkel i tidsskrift (Fagfellevurdert) Published
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Abstract [en]

Low-frequency hearing is critically important for speech and music perception, but no mechanical measurements have previously been available from inner ears with intact low-frequency parts. These regions of the cochlea may function in ways different from the extensively studied high-frequency regions, where the sensory outer hair cells produce force that greatly increases the sound-evoked vibrations of the basilar membrane. We used laser interferometry in vitro and optical coherence tomography in vivo to study the low-frequency part of the guinea pig cochlea, and found that sound stimulation caused motion of a minimal portion of the basilar membrane. Outside the region of peak movement, an exponential decline in motion amplitude occurred across the basilar membrane. The moving region had different dependence on stimulus frequency than the vibrations measured near the mechanosensitive stereocilia. This behavior differs substantially from the behavior found in the extensively studied high-frequency regions of the cochlea.

sted, utgiver, år, opplag, sider
NATL ACAD SCIENCES , 2016. Vol. 113, nr 30, s. E4304-E4310
Emneord [en]
hearing; basilar membrane; optical coherence tomography; hair cells
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-130654DOI: 10.1073/pnas.1606317113ISI: 000380346200009PubMedID: 27407145OAI: oai:DiVA.org:liu-130654DiVA, id: diva2:954249
Merknad

Funding Agencies|Swedish Research Council [K2014-63X-14061-14-5]; Torsten Soderberg Foundation; Stiftelsen Tysta Skolan; Strategic Research Area for Systems Neuroscience; NIH National Institute on Deafness and other Communication Disorders [DC 00141, 000105, DC 005983, NS 061800, R01 DC 010399]

Tilgjengelig fra: 2016-08-22 Laget: 2016-08-19 Sist oppdatert: 2018-03-28

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