Study on suppression of otoacoustic emissions: lateral domain.
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.


OBJECTIVE
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.


CONCLUSIONS
There is no lateral dominance in the degree of otoacoustic emissions in the presence of suppression/reduction in the study population.
Department of Mechanical Engineering, Paulista State University.
Jerusa Roberta Massola de
JR
Oliveira
Candido Fernandes
CF
Fernandes
Orozimbo Alves
OA
Costa Filho
D000161:Acoustic Stimulation; D000328:Adult; D000368:Aged; D001309:Auditory Threshold / Q000502:physiology; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D017084:Otoacoustic Emissions, Spontaneous / Q000502:physiology*