内喉頭筋の呼吸運動に対する神経性調節の研究

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Although it is known that respiratory movement of the intrinsic laryngeal muscles is controlled by C.N.S. without reference to a local sensory information, the mechanism has not yet been elucidated.The present electromyographic study was undertaken to investigate numerous factors that participate in the respiratory movement of the larynx.In this experiment only the nervous regulation was discussed. Matured rabbits, given local anaesthesia, were used for experiment.The results were as follows;1. Experimental demonstration of Hering-Breuer reflex.When expansion and construction of the unilateral lung was motivated artifically by a specific apparatus, Hering-Breuer reflex was observed in the intrinsic laryngeal muscles.2. Experimental demonstration of carotid sinus reflex.When compression or depression was given to the one side or both side of the common carotid artery, unusual electromyographic discharges were seen in the larynx.Adrenalin apnea was also demonstrated.3. Experimental demonstration of protective reflex.When visual, olfactory and cutaneous (thermal and pain) stimulation were given, electromyographic discharge were observed in the intrinsic laryngeal muscles.Conclusion ;The intrinsic laryngeal muscles are regulated by central mechanism through various nervous reflex, as well as other respiratory muscles.In view of the above findings, the intrinsic laryngeal muscles do not appear to be accessory which is contrary to the hypothesis accepted so far.
社団法人日本耳鼻咽喉科学会の論文

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八木正勝
京都府立医科大学耳鼻咽喉科学教室

内喉頭筋の呼吸運動に対する神経性調節の研究

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