音刺激に対する非特異瞬時値脳波変化の検討

概要

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The frequency analysis of the changes of EEG to the auditory stimulus was carried out, to study if the method can be applied clinically to the objective audiometory.In recording the changes in the instant value of EEG to the sound, a limit sound level to which the changes were recognized (threshold), and the relation to the background activity (especially the stages of natural sleep) were observed.The bipolar electrode was implanted chronically in the Vertex of rabbits.The stimuli were the pure tones with the duration of 5 seconds and a minimum of 30 seconds was allowed to elapse between the stimuli.The frequency range with some changes in the instant value to the tones at the lower intensity was mostly 9c/s, especially 7c/s less, and the percentage of the positive changes was as below, highest in the drowsy stage and lowest in the deep sleep.But the considerable percentage of occurrence of the false-positives required the presentation of the number of same tone, making accuracy not posible.The results lead the author to conclude that this method is not suitable for human objective audiometory.
社団法人日本耳鼻咽喉科学会の論文