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Titolo:
Latency as a function of intensity in auditory neurons: influences of central processing
Autore:
Klug, A; Khan, A; Burger, RM; Bauer, EE; Hurley, LM; Yang, LC; Grothe, B; Halvorsen, MB; Park, TJ;
Indirizzi:
Univ Illinois, Dept Biol Sci, Neurobiol Grp, Chicago, IL 60607 USA Univ Illinois Chicago IL USA 60607 , Neurobiol Grp, Chicago, IL 60607 USA Univ Texas, Neurobiol Sect, Austin, TX 78712 USA Univ Texas Austin TX USA78712 exas, Neurobiol Sect, Austin, TX 78712 USA Max Planck Inst Neurobiol, Martinsried, Germany Max Planck Inst NeurobiolMartinsried Germany iol, Martinsried, Germany
Titolo Testata:
HEARING RESEARCH
fascicolo: 1-2, volume: 148, anno: 2000,
pagine: 107 - 123
SICI:
0378-5955(200010)148:1-2<107:LAAFOI>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
BATS INFERIOR COLLICULUS; MEDIAL SUPERIOR OLIVE; COMBINATION-SENSITIVE NEURONS; FREE-TAILED BAT; LATERAL LEMNISCUS; MOUSTACHED BAT; ECHOLOCATING BAT; RESPONSE PROPERTIES; COCHLEAR NUCLEUS; DISCHARGE CHARACTERISTICS;
Keywords:
latency; auditory neurons; central processing; central auditory system;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
70
Recensione:
Indirizzi per estratti:
Indirizzo: Park, TJ Univ Illinois, Dept Biol Sci, Neurobiol Grp, 845 W Taylor St,M-C 066, Chicago, IL 60607 USA Univ Illinois 845 W Taylor St,M-C 066 Chicago ILUSA 60607 07 USA
Citazione:
A. Klug et al., "Latency as a function of intensity in auditory neurons: influences of central processing", HEARING RES, 148(1-2), 2000, pp. 107-123

Abstract

The response latencies of sensory neurons typically shorten with increasesin stimulus intensity. In the central auditory system this phenomenon should have a significant impact on a number of auditory functions that depend critically on an integration of precisely timed neural inputs. Evidence from previous studies suggests that the auditory system not only copes with the potential problems associated with intensity-dependent latency change, but that it also modifies latency change to shape the response properties of many cells for specific functions. This observation suggests that intensity-dependent latency change may undergo functional transformations along the auditory neuraxis. The goal of our study was to explore these transformations by making a direct, quantitative comparison of intensity-dependent latency change among a number of auditory centers from the lower brainstem to the thalamus. We found two main ways in which intensity-dependent latency change transformed along the neuraxis: (1) the range of latency change increased substantially and (2) one particular type of latency change, which has been suggested to be associated with sensitivity to temporally segregated stimulus components, occurred only at the highest centers tested, the midbrain and thalamus. Additional testing in the midbrain (inferior colliculus) indicated that inhibitory inputs are involved in shaping latency change. Our findings demonstrate that the central auditory system modifies intensity-dependent latency changes. We suggest that these changes may be functionally incorporated, actively enhanced, or modified to suit specific functions of the auditory system. (C) 2000 Elsevier Science B.V. All rights reserved.

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Documento generato il 01/12/20 alle ore 13:20:23