両耳刺激による聴性脳幹反応(ABR)についての研究

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The pattern of auditory brain stem response (ABR) evoked by binaural stimulation was compared with that evoked by ipsilateral and contralateral monaural stimulation and the summation of the two. The effects of electrode locations and the direction of stimuli were also examined to observe the direction of vectors of each component potential and to study the possibility of the so-called binaural interaction. Further comparison was made between psychoacoustic effects of binaural hearing and the pattern of ABR with special regards to each wave component. The results were as follows. 1. Each component of ABR is basically a vector trending toward vertex, and the later components tend to incline upward. Thus the direction of the potentials appears to oincidewith that of the central auditory pathway. It is assumed that Wave I is derived from the acoustic nerve, while the waves after Wave III are from the nuclei or nerves of the brain stem auditory pathway. 2. It is considered that binaural ABR is an algebraic sum of scaras of each vector evoked bysimultaneous stimulation of both ears and coincides with the summed ABR of monaural stimulation. It is thus concluded that the presence of binaural interaction can not be substantiated. 3. It is concluded that psychoacoustic binaural summation is related to Wave JJJ, while Wave V is indispensable to sound lateralization or localization. 4. The result of the present study would suggest that those waves after Wave III are derived from nuclei or nerves in the brain stem innervated by bilateral neurons. More specifically, Wave III is derived from the superior olivery complex and Wave V is from the nuclei or nerves above the superior olivary complex, lateral leminiscus and inferior collinuli.
社団法人日本耳鼻咽喉科学会の論文

両耳刺激による聴性脳幹反応(ABR)についての研究

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