Nihon Jibiinkoka Gakkai kaiho
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Nippon Jibiinkoka Gakkai Kaiho · Aug 1994
[Pliability of vocal fold mucosa in relation to the location of subglottic mucosal upheaval during phonation].
Mucosal pliability was measured in 23 excised larynges, 19 canine and four human, at the three portions of the vocal fold, namely the midline, the anterior 1/4 and the posterior 1/4. The pliability at the midline showed a greater value than those at the other two portions. The free edge of the vocal fold showed a maximum pliability which gradually diminished toward the tracheal side and reached a minimum 3mm from the free edge of the fold. ⋯ At this point, the muscle layer approximated the epithelial layer with disappearance of the deep layer of the lamina propria. The point shifted to the oral side following an increment in vocal fold tension, while the point moved toward the tracheal side following contraction of the TA. Pliability of the vocal fold is minimal at the point around which the deep layer of the lamina propria disappears and the mucosal upheaval occurs.