Study on suppression of otoacoustic emissions: lateral domain

Revista Brasileira de Otorrinolaringologia

Fernandes, Candido Fernandes¹  Oliveira, Jerusa Roberta Massola de²  Costa Filho, Orozimbo Alves³ 

[1] Júlio de Mesquita Filho Paulista State University;Paulista State University;São Paulo University

关键词: auditory pathways;    otoacoustic emissions;    spontaneous;    suppression.;   

DOI  :  10.1590/S1808-86942011000500002

学科分类：医学（综合）

来源: Associacao Brasileira de Otorrinolaringologia e Cirurgia Cervicofacial

【 摘 要 】

A pon stimulation by contralateral, ipsilateral or bilateral noise, the medial olivocochlear efferent tract changes the amplitude of otoacoustic emissions relative to the tested ear, reducing or removing it; this resulted in a reduction/suppression effect of otoacoustic emissions. Differences in patterns of elimination/reduction of otoacoustic emissions between ears have been documented worldwide; there are, however, no Brazilian studies investigating the effect of lateral dominance. AIMS: To compare the effect of the presence of deletion/reduction of otoacoustic emissions and their amplitude relative to lateral dominance in normal hearing adults. METHODS: A clinical and experimental study. The sample comprised 75 individuals. The methodology was conventional - linear click intensity of 60 dB SPL; white noise was contralateral stimulation at 60 dB SPL. DESCRIPTION OF RESULTS: There were no statistically significant differences between right and left ear results, in terms of asymmetry of the degree of otoacoustic emissions and the presence of suppression/reduction. CONCLUSION: There is no lateral dominance in the degree of otoacoustic emissions in the presence of suppression/reduction in the study population.

【 授权许可】

CC BY