内耳微細電気刺激による前庭および蝸牛反応

概要

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The vestibular and cochlear nerves were stimulated by microelectrical stimulation, and the evoked potentials were recorded from scalp of the cat. The evoked response following electrical stimulation of vestibular nerve consisted of two negative peaks and that of cochlear nerve basically four positive peaks. The both evoked responses and each peaks were stable and reliable. The field potentials of the vestibular and cochlear nuclei were recorded simultanousely, and those results-were compared with each evoked response. The latencies of deflection and peak of the field potentials in the vestibular nucleus were almost the same in the evoked responses. The stimulating threshold and the maximam point of the each evoked response were the same in each field potentials.The cutting of the vestibular and cochlear nerves selectively in the internal auditory meatus showed releasing of each evoked response. The stimulation of both vestibular and cochlear nerves could get the combinative responses. A simultanous stimulation of the vestibular and cochlear nerves revealed mixed waves. And the configulation was formed from just algebrical summation of the both nerves.This suggests that there is no interaction between vestibular and cochlear nervous systems.In conclusion, the responses recorded from the scalp are caused by vestibular or cochlear nerve stimulation.
社団法人日本耳鼻咽喉科学会の論文