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Mechanical response characteristics of the hearing organ in the low-frequency regions of the cochlea
Karolinska Institutet, Stockholm, Sweden.
Karolinska Institutet, Stockholm, Sweden.
Karolinska Institutet, Stockholm, Sweden.
Karolinska Institutet, Stockholm, Sweden.
Vise andre og tillknytning
1996 (engelsk)Inngår i: Journal of Neurophysiology, ISSN 0022-3077, E-ISSN 1522-1598, Vol. 76, nr 6, s. 3850-3862Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

1. With the use of an in vitro preparation of the guinea pig temporal bone, in which the apical turns of the cochlea are exposed, the mechanical and electrical responses of the cochlea in the low-frequency regions were studied during sound stimulation. 2. The mechanical characteristics were investigated in the fourth and third turns of the cochlea with the use of laser heterodyne interferometry, which allows the vibratory responses of both sensory and supporting cells to be recorded. The electrical responses, which can be maintained for several hours, were recorded only in the most apical turn. 3. In the most apical turn, the frequency locations and shapes of the mechanical and electrical responses were very similar. 4. The shapes of the tuning curves and the spatial locations of the frequency maxima in the temporal bone preparation compared very favorably with published results from in vivo recordings of hair cell receptor potentials and sound-induced vibrations of the Reissner's membrane. 5. Compressive nonlinearities were present in both the mechanical and the electrical responses at moderate sound pressure levels. 6. The mechanical tuning changed along the length of the cochlea, the center frequencies in the fourth and third turns being approximately 280 and 570 Hz, respectively. 7. The mechanical responses of sensory and supporting cells were almost identical in shape but differed significantly in amplitude radially across the reticular lamina.

sted, utgiver, år, opplag, sider
American Physiological Society , 1996. Vol. 76, nr 6, s. 3850-3862
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-101083PubMedID: 8985883OAI: oai:DiVA.org:liu-101083DiVA, id: diva2:665128
Tilgjengelig fra: 2013-11-19 Laget: 2013-11-19 Sist oppdatert: 2018-01-11bibliografisk kontrollert

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