STUDIES ON THE INSERTION OF THE FACIAL MUSCLES AND THE MUSCLES WHICH FORM THE RESONANCE CAVITY

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  • TSUZAKI M.
    The Oto-Rhino-Laryngological Clinic, Branch Hospital, University of Tokyo

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  • 顔面筋並びに付属管腔構成筋の筋付着に関する研究
  • ガンメンキン ナラビニ フゾクカンコウコウセイキン ノ キン フチャク ニ カンスル ケンキュウ

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The purpose of this study is to observe morphologically the facial muscles and the muscles which form the resonance cavity and to find the relations between the state of the former and the delicate change of the expression as well as the latter and that of the resonance cavity in the tone production.<br>The method which was adopted was to dissect the facial, lingual, pharyngeal and laryngeal muscle, and to observe in detail the states of the insertions of the bundles of these muscle fibers, i.e., the relations of these bundles to the cutis, the mucous membrane and the connective tissue, using the binocular magnifier.<br>The materials were (1) the skin of the face, the tongue, the pharynx and the larynx, which were gained by the pathological dissection, (2) the head of a Japanese male and (3) the head of airus monkey.<br>The following results were obtained: ......<br>1. Muscle bundles of the facial, some of the pharyngeal and the laryngeal muscles interlace or join with each other.<br>2. Slender muscle bundles of the facial, pharyngeal and laryngeal muscles radiate into the con-nective tissue, and are inserted indirectly into the cutis and the mucous membrane. But muscle bundles of the lingual muscle are attached firmly to the lingual aponeurosis.<br>3. The facial muscle is inserted in the various states, but the lingual, pharyngeal and laryngeal muscles are inserted comparatively monotonous.<br>4. The facicl and laryngeal muscles of the irus monkey are not so differentiated as those of the human, but as far as the states of the insertion are concerned, no essencial difference can be ob-served.<br>From the:results_above mentioned, it is reasoned that the features of the insertions of the muscles which form the resonance cavity control its delicate change in the tone production, just like as the states of the, insertions of the. facial muscles take part in the delicate change of the expression.

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