| Auditory efferents facilitate sound localization in noise in humans. | |
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MedLine Citation:
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PMID: 21543605 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The mammalian auditory system contains descending neural pathways, some of which project onto the cochlea via the medial olivocochlear (MOC) system. The function of this efferent auditory system is not entirely clear. Behavioral studies in animals with olivocochlear (OC) lesions suggest that the MOC serves to facilitate sound localization in noise. In the current work, noise-induced OC activity (the OC reflex) and sound-localization performance in noise were measured in normal-hearing humans. Consistent with earlier studies, both measures were found to vary substantially across individuals. Importantly, significant correlations were observed between OC-reflex strength and the effect of noise on sound-localization performance; the stronger the OC reflex, the less marked the effect of noise. These results suggest that MOC activation by noise helps to counteract the detrimental effects of background noise on neural representations of direction-dependent spectral features, which are especially important for accurate localization in the up/down and front/back dimensions. |
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Authors:
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Guillaume Andéol; Anne Guillaume; Christophe Micheyl; Sophie Savel; Lionel Pellieux; Annie Moulin |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of neuroscience : the official journal of the Society for Neuroscience Volume: 31 ISSN: 1529-2401 ISO Abbreviation: J. Neurosci. Publication Date: 2011 May |
Date Detail:
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Created Date: 2011-05-05 Completed Date: 2011-08-05 Revised Date: 2011-12-30 |
Medline Journal Info:
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Nlm Unique ID: 8102140 Medline TA: J Neurosci Country: United States |
Other Details:
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Languages: eng Pagination: 6759-63 Citation Subset: IM |
Affiliation:
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Institut de Recherche Biomédicale des Armées, Département Action et Cognition en Situation Opérationnelle, 91223 Brétigny sur Orge, France. gandeol@imassa.fr |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Adult Analysis of Variance Auditory Pathways / physiology* Cochlea / physiology* Efferent Pathways / physiology Female Humans Male Neurons, Efferent / physiology* Noise Otoacoustic Emissions, Spontaneous / physiology Sound Localization / physiology* |
| Grant Support | |
ID/Acronym/Agency:
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R01 DC010374/DC/NIDCD NIH HHS; R01 DC010374-02/DC/NIDCD NIH HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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