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Light-Induced Basil...
Light-Induced Basilar Membrane Vibrations in the Sensitive Cochlea
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- Grosh, Karl (author)
- University of Michigan, MI 48109 USA
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- Ren, Tianying (author)
- Oregon Health and Science University, OR 97201 USA
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- He, Wenxuan (author)
- Oregon Health and Science University, OR 97201 USA
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- Fridberger, Anders (author)
- Linköpings universitet,Avdelningen för cellbiologi,Medicinska fakulteten,Karolinska Institute, Sweden
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- Li, Yizeng (author)
- Johns Hopkins University, MD 21218 USA
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- Nankali, Amir (author)
- University of Michigan, MI 48109 USA
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(creator_code:org_t)
- AMER INST PHYSICS, 2015
- 2015
- English.
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In: MECHANICS OF HEARING: PROTEIN TO PERCEPTION. - : AMER INST PHYSICS. - 9780735413504
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The exceptional sensitivity of mammalian hearing organ is attributed to an outer hair cell-mediated active process, where forces produced by sensory cells boost sound-induced vibrations, making soft sounds audible. This process is thought to be local, with each section of the hearing organ capable of amplifying sound-evoked movement, and nearly instantaneous, since amplification can work for sounds at frequencies up to 100 kHz in some species. To test these precepts, we developed a method for focally stimulating the living hearing organ with light. Light pulses caused intense and highly damped mechanical responses followed by traveling waves that developed with considerable delay. The delayed response was identical to movements evoked by click-like sounds. A physiologically based mathematical model shows that such waves engage the active process, enhancing hearing sensitivity. The experiments and the theoretical analysis show that the active process is neither local nor instantaneous, but requires mechanical waves traveling from the cochlear base toward its apex.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine (hsv//eng)
Publication and Content Type
- ref (subject category)
- kon (subject category)
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