Binaural Interaction of Bone-conducted Auditory Brainstem Responses

Mitsutoshi Setou From the Departments of Otolaryngolog y, Faculty of Medicine, University of Tokyo and Departments of Otolaryngology, Teikyo University, Tokyo, Japan

Takahide Kurauchi From the Departments of Otolaryngolog y, Faculty of Medicine, University of Tokyo and Departments of Otolaryngology, Teikyo University, Tokyo, Japan

Toshihiro Tsuzuku From the Departments of Otolaryngolog y, Faculty of Medicine, University of Tokyo and Departments of Otolaryngology, Teikyo University, Tokyo, Japan

Kimitaka Kaga From the Departments of Otolaryngolog y, Faculty of Medicine, University of Tokyo and Departments of Otolaryngology, Teikyo University, Tokyo, Japan

Abstract

Bone-conducted auditory brainstem responses (ABRs) elicited by monoaural stimulation are very useful for evaluating hearing in children with congenital atresia of both ears. In a previous study of sound lateralization in children with congenital atresia of both ears, using bilateral bone-conducted stimuli, we found that most of the children could sufficiently retain binaural hearing ability in terms of both intensity and time differences. In this study we attempted to record bilateral bone-conducted ABRs in normal subjects in order to explore binaural interaction objectively. The study revealed that binaural interaction exists in bone-conducted ABRs. This can be taken as neurophysiological evidence that sound lateralization can be detected by children with bilateral microtia and atresia.

Keywords

Microtia Atresia Auditory Brainstem Responses Binaural Interaction Bone Conduction

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Binaural Interaction of Bone-conducted Auditory Brainstem Responses

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Binaural Interaction of Bone-conducted Auditory Brainstem Responses

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