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Titolo:
Inner hair cell response patterns: Implications for low-frequency hearing
Autore:
Cheatham, MA; Dallos, P;
Indirizzi:
Northwestern Univ, Hugh Knowles Ctr, Evanston, IL 60208 USA Northwestern Univ Evanston IL USA 60208 owles Ctr, Evanston, IL 60208 USA
Titolo Testata:
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
fascicolo: 4, volume: 110, anno: 2001,
pagine: 2034 - 2044
SICI:
0001-4966(200110)110:4<2034:IHCRPI>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
GUINEA-PIG COCHLEA; AUDITORY-NERVE FIBERS; BASILAR-MEMBRANE RESPONSES; CHINCHILLA COCHLEA; 2-TONE SUPPRESSION; TUNING CURVES; INTRACELLULAR-RECORDINGS; NONLINEAR MECHANICS; MOSSBAUER TECHNIQUE; IMPULSE RESPONSES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Engineering, Computing & Technology
Citazioni:
78
Recensione:
Indirizzi per estratti:
Indirizzo: Cheatham, MA Northwestern Univ, Hugh Knowles Ctr, 2-240 Frances Searle Bldg,2299 N Campus Dr, Evanston, IL 60208 USA Northwestern Univ 2-240 Frances Searle Bldg,2299 N Campus Dr Evanston IL USA 60208
Citazione:
M.A. Cheatham e P. Dallos, "Inner hair cell response patterns: Implications for low-frequency hearing", J ACOUST SO, 110(4), 2001, pp. 2034-2044

Abstract

Inner hair cell (IHC) responses to tone-burst stimuli were measured from three locations in the apical half of the guinea pig cochlea. In addition tothe measurement of ac receptor potentials, average intracellular voltages,reflecting both ac and dc components of the receptor potential, were computed and compared to determine how bandwidth changes with level. Companion phase measures were also obtained and evaluated. Data collected from turn 2,where best frequency (BF) is approximately 4000 Hz, indicate that frequency response functions are asymmetrical with steeper slopes above the best frequency of the cell. However, in turn 4, where BF is around 250 Hz, the opposite behavior is observed and the steepest slopes are measured below BF. The data imply that cochlear filters are generally asymmetrical with steeperslopes above BF. High-pass filtering by the middle ear serves to reduce this asymmetry in turn 3 and to reverse it in turn 4. Apical response patterns are used to assess the degree to which the middle ear transfer function, the IHC's velocity dependence and the shunting effect of the helicotrema influence low-frequency hearing in guinea pigs. Implications for low-frequency hearing in man are also discussed. (C) 2001 Acoustical Society of America.

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Documento generato il 05/12/20 alle ore 13:50:22