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Auditory and Vestibular Systems

Sound‐induced laryngeal and respiratory reflexes originate from vestibular afferents

Kobayashi, Nobuhiro1,2; Shiba, Keisuke1,3; Nakazawa, Ken2; Satoh, Isamu1; Nakajima, Yoshio2; Konno, Akiyoshi1

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To determine whether the auditory or vestibular system causes the sound-induced laryngeal reflex, which has been considered to participate in the auditory feedback control of vocalization, click-induced laryngeal responses were compared before and after sectioning of the cochlear and/or vestibular nerves in cats. The sound-induced reflex modulation of respiratory muscle activity was also investigated, because respiratory movement is important for vocal control. Sectioning of the cochlear nerves had little influence on these responses. In contrast, sectioning of the vestibular nerves abolished these responses. It was concluded that the sound-induced laryngeal and respiratory reflexes are attributed to the vestibular system.

© 2000 Lippincott Williams & Wilkins, Inc.


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