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Titolo:
Peripheral auditory asymmetry in infantile autism
Autore:
Khalfa, S; Bruneau, N; Roge, B; Georgieff, N; Veuillet, E; Adrien, JL; Barthelemy, C; Collet, L;
Indirizzi:
Hop Edouard Herriot, CNRS, UPRESA 5020, F-69003 Lyon, France Hop Edouard Herriot Lyon France F-69003 PRESA 5020, F-69003 Lyon, France CHU Bretonneau, INSERM, U316, Child Psychiat Unit, F-37044 Tours, France CHU Bretonneau Tours France F-37044 Psychiat Unit, F-37044 Tours, France Hop lagrave, Serv Psychiat & Psychol Med, F-31051 Toulouse, France Hop lagrave Toulouse France F-31051 sychol Med, F-31051 Toulouse, France Hop Specialise Vinatier, F-69677 Bron, France Hop Specialise Vinatier Bron France F-69677 natier, F-69677 Bron, France
Titolo Testata:
EUROPEAN JOURNAL OF NEUROSCIENCE
fascicolo: 3, volume: 13, anno: 2001,
pagine: 628 - 632
SICI:
0953-816X(200102)13:3<628:PAAIIA>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVOKED OTOACOUSTIC EMISSIONS; HEARING-LOSS; LATERALIZATION; CHILDREN; NOISE; DYSFUNCTION; HANDEDNESS; COMPLEX; SYSTEM; HUMANS;
Keywords:
lateralization; medial olivocochlear system; neurodevelopmental disorders; otoacoustic emission;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Khalfa, S Univ Montreal, Dept Psychol, CP 6128 Succursale Ctr Ville, Montreal, PQ H3C 3J7, Canada Univ Montreal CP 6128 Succursale Ctr Ville MontrealPQ Canada H3C 3J7
Citazione:
S. Khalfa et al., "Peripheral auditory asymmetry in infantile autism", EUR J NEURO, 13(3), 2001, pp. 628-632

Abstract

Difficulty in filtering relevant auditory information in background noise is one of the features of autism. Auditory filtering processes can be investigated at the peripheral level as they are hypothesized to involve active cochlear mechanisms which are regulated by the efferent activity of the medial olivocochlear (MOC) system. The aim of the present work was therefore to assess these peripheral auditory processes in 22 children and adolescentswith autism compared with age- and gender-matched normal controls. Active cochlear mechanisms were evaluated with transiently evoked otoacoustic emissions (TEOAEs) and MOC system efficiency was assessed via TEOAEs which are decreased when stimulating the contralateral ear with noise. The MOC systemevaluation was performed on 18 of the 22 children. In both studies, results were analysed according to age (from 4 to 10 years and from 11 to 20 years). The main result concerns the asymmetry of the efferent system which differs in individuals with autism. Several neural processes might be hypothesized as involved in the results obtained as the MOC system which originatesin the brainstem received regulating controls from upper brain structures including auditory cortex. Lateralization abnormalities at the auditory periphery may reflect indirectly a problem at a higher level of auditory processing. A second important result shows a decrease in TEOAE amplitude with age, in patients, that may correspond to a decrease in hearing sensitivity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 19:39:45