Nihon Jibiinkoka Gakkai kaiho
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Nippon Jibiinkoka Gakkai Kaiho · Aug 1992
[High speed cinematographic analysis of subglottal mucosal vibration during experimentally induced phonation in excised larynges].
Twenty-seven excised canine larynges and two excised human larynges fixed on a wall of a specially constructed glass box, were blown on and the subglottal mucosal vibrations were photographed using high speed cinematography from the tracheal side. Each film was repeatedly projected at normal speed and analyzed frame by frame. Mucosal upheaval appeared between the anterior commissure and the vocal process. ⋯ Histological examination revealed that the mucosal upheaval arose on the lower surface of the vocal fold, slightly above the area where the muscular layer came close to the epithelial layer. After the cricothyroid approximation, the mucosal upheaval occurred in a more upward area where the lamina propria was thicker. In addition, after stimulation of the TA, the mucosal upheaval was located in the area where the muscular layer was thick under the epithelial layer.