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Titolo:
DISTORTION-PRODUCT OTOACOUSTIC EMISSIONS AND THEIR ANESTHESIA SENSITIVITY IN THE EUROPEAN STARLING AND THE CHICKEN
Autore:
KETTEMBEIL S; MANLEY GA; SIEGL E;
Indirizzi:
TECH UNIV MUNICH,INST ZOOL,LICHTENBERGSTR 4 D-85747 GARCHING GERMANY TECH UNIV MUNICH,INST ZOOL D-85747 GARCHING GERMANY
Titolo Testata:
Hearing research
fascicolo: 1-2, volume: 86, anno: 1995,
pagine: 47 - 62
SICI:
0378-5955(1995)86:1-2<47:DOEATA>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
NORMALLY HEARING SUBJECTS; 2 DISCRETE SOURCES; ACOUSTIC DISTORTION; BASILAR PAPILLA; BOBTAIL LIZARD; PHYSIOLOGICAL VULNERABILITY; EAR; 2F1-F2; HUMANS; RABBIT;
Keywords:
DISTORTION-PRODUCT EMISSION; DPOAE; OTOACOUSTIC EMISSION; BIRD HEARING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
40
Recensione:
Indirizzi per estratti:
Citazione:
S. Kettembeil et al., "DISTORTION-PRODUCT OTOACOUSTIC EMISSIONS AND THEIR ANESTHESIA SENSITIVITY IN THE EUROPEAN STARLING AND THE CHICKEN", Hearing research, 86(1-2), 1995, pp. 47-62

Abstract

The aim of the present experimental series was to provide further information on the distortion-product otoacoustic emissions (DP) of birdsand contribute to a general understanding of DP generation. Basic characteristics of the DP 2f(1)-f(2) and 2f(2)-f(1) were measured in the ear canal of both awake and anaesthetized European Starlings and chickens. The effect of a third suppressive tone and the behaviour of the DP under anaesthesia were also studied. In general, the DP characteristics of both bird species resembled those of lizards and mammals, but first appeared at somewhat higher primary-tone levels. The best frequencies of third tones suppressing 2f(1)-f(2) lay near the first primary tone (f(1)), but for 2f(2)-f(1), the situation was more complex. Facilitation via a third tone was also seen for both DP, often at levels below those eliciting suppression. The DP 2f(1)-f(2) disappeared completely at the onset of deep anaesthesia and recovered to its original magnitude when the anaesthesia was lightened, sometimes with a considerable delay. The compound action potential (CAP) was somewhat more sensitive to anaesthesia than the DP. Control experiments showed that the anaesthesia effect was not a result of hypoxia. Avian DP at low and intermediate sound levels are thus physiologically-sensitive manifestations of normal hair-cell function that are, in contrast to mammals, also anaesthesia-sensitive.

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Documento generato il 05/12/20 alle ore 02:07:29