Yumoto E, Kadota Y, Kurokawa H
Department of Otolaryngology, School of Medicine, Ehime University, Japan.
J Voice. 1993 Dec;7(4):311-8. doi: 10.1016/s0892-1997(05)80119-5.
The mucosal upheaval (MU), where the mucosal wave starts and propagates upward, appears only when the vocal fold vibrates. The location of the MU histologically and the effect of changes in mean air flow rate (MFR) and vocal fold length on occurrence of the MU were studied in twelve excised canine larynges. The lower surface of the vocal fold was marked to serve as a landmark for subsequent study. Cricothyroid approximation was performed to lengthen the vocal fold. After taking high-speed pictures or recording stroboscopic images from the tracheal side, a small cut wound was made at the mark. This wound served to compare the position of the MU with the histologically identified location of the mark. The larynx was then sectioned in the frontal plane. Before lengthening the vocal fold, the MU occurred on the area where the lamina propria became thinner and where the muscular layer neared the epithelial layer. After lengthening the vocal fold, the MU actually shifted medially compared with its original position. The subglottic area surrounded by the bilateral MUs became longer and thinner. Whether or not complete glottal closure during a vibratory cycle was achieved did not alter these findings. In contrast, with a fixed vocal fold length the MU appeared more laterally as MFR increased, but, based on the relation with the mark, its location on the vocal fold did not change from its original position before increase of MFR.
黏膜隆起（MU）是黏膜波起始并向上传播的部位，仅在声带振动时出现。在12个切除的犬类喉部研究了MU的组织学位置以及平均气流量（MFR）和声带长度变化对MU发生的影响。在声带的下表面做标记，作为后续研究的标志。进行环甲肌靠拢以延长声带。从气管侧拍摄高速照片或记录频闪图像后，在标记处做一个小切口。这个切口用于将MU的位置与标记的组织学确定位置进行比较。然后将喉部在额平面切开。在延长声带之前，MU出现在固有层变薄且肌肉层靠近上皮层的区域。延长声带后，MU实际上相对于其原始位置向内侧移位。由双侧MU包围的声门下区域变得更长更窄。在振动周期中是否实现完全声门闭合并不改变这些结果。相反，在声带长度固定的情况下，随着MFR增加，MU出现在更外侧，但基于与标记的关系，其在声带上的位置在MFR增加之前与其原始位置没有变化。
