Influence of the contralateral acoustic stimulation on the acoustic otoemissions: response modulation by the efferent olivocochlear system
Morant Ventura, A.; Marco Algarra, J.; Caballero Mallea, J.; Orts Alborch, M.; Sequi Canet, J.M.; Mir Planas, B.
Acta Otorrinolaringologica Espanola 43(5): 307-310
1992
ISSN/ISBN: 0001-6519 PMID: 1492986 Document Number: 392264
We have correlated in 16 patients (32 ears), the modifications de EOEs before and after sound stimulation of the contralateral ear. The recording of the EOEs has been performed in a sound proof room with ILO 88 from Otodynamics Ltd., the analysis has been made with the ILO 88 V.3.5 software. We have tried to study the modulator rol of the medial efferent coclear system on the external ciliated cells. In the results we observe a decrease of the amplitude in the EOEs when the contralateralmears is stimulated a white noise, in relation with the nonstimulation situation. When pures tones are used contralateral stimulation the decrease in the EOEs amplitude takes place in the same frequency spectrum as the pure tone used.