内喉頭筋の呼吸運動•並びに神経支配に関する筋電図学的研究

清水 三郎

doi:10.3950/jibiinkoka.63.1691

An electromyographicalstudy of the intrinsic laryngeal muscles was performed in order to know their effect on the respiratory movements. And their innervation the denervation of the nerve which supplied to them. The results obtained were as follows. 1) The adductor muscles of the vocal cord contracted at the period of exspiration. During deep breathing their contraction was rather strong and the times of their discharge became longer. 2) The cricoarytenoideus posticus muscle was divided into two groups from the types of their contraction. One was A group in which, the muscle contracted at the period of inspiration. The other was B group in which it contracted at the period of exspiration. During deep breathing the contraction in A group increased and the time of its discharge became longer and the strong contraction in B group, which was supposed to be stimulated through other motor unit, was observed at the period of of inspiration. The following results were obtained by the experiments of denervation: 3) It was considered that the cricothyreoideus anterior muscle took its motor supply from the external branch of the superior laryngeal nerve. 4) The motor supply of the cricoarytenoideus lateralis muscle was from two nerves, namely the superior laryngeal nerve and the reccurent nerve. And it was reasonable to presume that the later nerve played as the main. 5) The transversus arytenoideus muscle took its motor supply from the bilateral reccurent nerves. The nerve supply of the superior laryngeal nerve to this muscle did not been proved. 6) M. vocalis was considered to be supplied from the reccurent nerve. 7) It was considered that the cricoarytenoideus posticus muscle took its motor supply from the reccurent nerve.

内喉頭筋の呼吸運動•並びに神経支配に関する筋電図学的研究

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内喉頭筋の呼吸運動•並びに神経支配に関する筋電図学的研究

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