Assessment of the role of the cochlear latency effect in lateralization of click sounds in humans

Psychophysiology - Tập 46 Số 4 - Trang 797-806 - 2009
Bülent Özmen1, Pekcan Ungan1
1Department of Biophysics, Faculty of Medicine, Hacettepe University, Ankara, Turkey

Tóm tắt

Abstract

Interaural time and intensity disparities (ITD and IID) are the two cues to sound lateralization. “Time‐only” hypothesis claims that an IID is first converted to an interaural afferent delay (Δt), and is then processed by the central ITD mechanism, rendering a separate IID processor unnecessary. We tested this hypothesis by assessing the contribution of the cochlear latency effect to the psychophysical ITD/IID trading ratio. Auditory brainstem responses (ABRs) were used to measure the interaural afferent delays (Δts) that developed with a 20/sec dichotic click train used in the trading experiment. Except for small IIDs at low loudness levels, the physiological Δt delay produced by an IID was significantly smaller than the ITD psychophysically traded for the same IID. We concluded that the cochlear latency effect alone cannot explain the psychophysical ITD/IID trading ratios and a separate IID mechanism must be involved.

Từ khóa


Tài liệu tham khảo

10.1121/1.1913419

10.1002/cne.10526

Blauert J., 1997, Spatial hearing. The psychophysics of human sound localization

10.2307/1413687

Boston J. R., 1985, Brainstem auditory‐evoked potentials, CRC Critical Reviews in Biomedical Engineering, 13, 97

10.1152/jn.1968.31.3.442

10.1016/B978-0-12-151804-2.50011-5

10.1007/BF00238032

10.1001/archotol.1978.00790120035006

10.1121/1.1909765

10.1121/1.1907784

10.1121/1.1907739

10.1121/1.1907740

10.1109/51.281682

10.1121/1.1910891

10.1152/jn.00491.2001

10.1016/j.brainres.2005.06.083

10.1152/jn.1969.32.4.613

10.1097/00003446-198503000-00008

10.1038/276

10.1121/1.1909026

10.1121/1.1913044

10.1121/1.1911121

10.1016/0378-5955(93)90070-H

Harnischfeger G., 1985, Interaural time and intensity coding in superior olivary complex and inferior colliculus of the echolocating bat Molossus ater, Journal of Neurophysiology, 53, 89, 10.1152/jn.1985.53.1.89

10.1121/1.1908181

10.1001/archotol.1974.00780030034006

Heil P., 2004, First‐spike latency of auditory neurons revisited, Current Opinion in Biology, 14, 461

10.1152/jn.1997.78.5.2438

10.1121/1.384756

Jeffress L. A., 1948, A place theory of sound localization, Journal of Comparative Physiology and Psychology, 61, 468

10.1152/jn.1995.73.3.1043

10.1152/jn.1998.79.1.253

10.1007/BF00362993

Klemm O., 1920, Untersuchungen über die lokalisation von schallreizen IV, Archiv fur die Gesamte Psychologie, 40, 117

10.1016/S0378-5955(00)00146-5

10.1016/j.heares.2006.12.006

10.3109/00016485809134779

10.1016/S0166-2236(03)00140-1

10.1121/1.380913

10.1002/1097-0029(20001115)51:4<403::AID-JEMT8>3.0.CO;2-Q

10.1159/000155390

10.1121/1.1907647

10.1146/annurev.physiol.61.1.497

Özmen B.(1996).Contribution of the level‐dependent cochlear delay to sound lateralization. Ph.D. thesis (in Turkish; abstract in English). Inst. Health Sciences Hacettepe University Ankara Turkey.

Park T. J., 1996, Neural delays shape selectivity to interaural intensity differences in the lateral superior olive, Journal of Neuroscience, 16, 6554, 10.1523/JNEUROSCI.16-20-06554.1996

10.1121/1.1911392

10.1016/0378-5955(96)00009-3

10.1016/S0378-5955(97)00033-6

10.1016/0013-4694(77)90003-7

10.1002/aja.1001680205

10.1016/j.heares.2006.03.018

Röser D.(1965).Schallrichtungsbestimmung bei krankhaft verändertem gehör [The determination of the direction of sound with defective hearing]. Dissertation Technische Hochschule Aachen.

10.1523/JNEUROSCI.10-11-03494.1990

10.1523/JNEUROSCI.08-02-00682.1988

10.1121/1.1914990

10.1121/1.1911238

10.1097/00003446-199710000-00006

10.1016/0378-5955(96)00066-4

10.1002/cne.903310208

Sullivan W. E., 1982, Possible neural mechanisms of target distance coding in auditory system of the echolocating bat Myotis lucifugus, Journal of Neurophysiology, 48, 1033, 10.1152/jn.1982.48.4.1033

10.1016/j.brainres.2006.03.095

10.1152/jn.1966.29.4.684

Tsuchitani C., 1988, The inhibition of cat lateral superior olive unit excitatory responses to binaural tone bursts. I. The transient chopper response, Journal of Neurophysiology, 59, 164, 10.1152/jn.1988.59.1.164

10.1016/S0378-5955(97)00003-8

10.1016/S0378-5955(02)00351-9

10.1016/S1388-2457(00)00550-2

10.1121/1.1918364

Wittmann J., 1925, Beiträge zur analyse des hörens bei dichotischer reizaufnahme [Contributions to the analysis of hearing when stimuli are collected dichotically], Archiv fur die Gesamte Psychologie, 51, 21

Wu S. H., 1991, Physiological properties of neurons in the mouse superior olive, Journal of Neurophysiology, 65, 230, 10.1152/jn.1991.65.2.230

10.1016/S0378-5955(96)00144-X

Yin T. C. T., 1988, Auditory function: Neurobiological bases of hearing

Young S., 1983, Frequency specific projections of individual neurons in chick brainstem auditory nuclei, Journal of Neuroscience, 7, 1373, 10.1523/JNEUROSCI.03-07-01373.1983