Infraglottic view of normal vocal fold vibration.

概要

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We examined normal vocal fold vibration from the tracheal side in 4 canine larynges by ultra-high speed cinematography. The larynx was fixed to the hole of a glass box. Then air was delivered to the glass box, representing subglottic space, for phonation. After cinematography, two of the four larynges were sectioned in a frontal plane and used for histologic examination. Mucosal upheaval appeared on a lower surface of the vocal fold during vibration. Mucosal vibration occurred from the mucosal upheaval, which vibrated with a small amplitude and with an earlier phase than the free edge of the vocal fold. The mucosal upheaval shifted upward when the vocal fold vibrated at a higher frequency. Histologic examination revealed that the mucosal upheaval arose on the lower surface of the vocal fold between the free edge and the area where the muscu-lar layer came close to the epithelial layer.
耳鼻咽喉科臨床学会の論文