Movement of the epiglottis in mammals
Movement of the epiglottis in mammals
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DOI：
10.1002/(sici)1096-8644(199605)100:1
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发表时间：
1996-05-01
影响因子：
2.8
通讯作者：
Herring, SW
中科院分区：
文献类型：
--
作者：
Larson, JE;Herring, SW
与成年人相比，其他哺乳动物和婴儿的会厌位置靠近软腭。有人认为，这种姿势在吞咽过程中得以维持，食物在完整的气道周围横向通过。为了验证这一假设，通过在会厌和软腭上放置不透射线标记来研究两种截然不同的哺乳动物（猪和雪貂）的会厌运动。当动物进食硬质和软质食物、液体以及与硫酸钡混合的食物时，通过视频荧光镜观察吞咽情况。对图像的分析表明，对于所有测试的食物，食团形成和会厌向下运动远离软腭在两只动物中都是不变的现象。对于液体，会厌运动的持续时间约为 0.3 秒，对于固体，会厌运动的持续时间稍长。由于吞咽从未发生过直立的会厌，因此这项研究的结果不支持成年动物在吞咽过程中保持气道畅通的假设。相反，非人类哺乳动物的会厌在吞咽过程中会像成年人一样向下折叠。 (C) 1996 Wiley-Liss, Inc.
In contrast to adult humans, the epiglottis of other mammals and infant humans is situated close to the soft palate. It has been argued that this posture is maintained during swallowing, with food passing laterally around an intact airway. To test this supposition, the movement of the epiglottis in two contrasting mammalian species, pigs and ferrets, was studied by placing radiopaque markers on the epiglottis and soft palate. Swallowing was observed with videofluoroscopy while the animals were feeding on hard and soft foods, liquids, and food mixed with barium sulfate. Analysis of the images showed that bolus formation and downward movement of the epiglottis away from the soft palate were unvarying phenomena in both animals for all tested foods. The duration of the epiglottic movement was approximately 0.3 s for liquids and slightly longer for solids. Because swallowing never occurred past an upright epiglottis, the results of this study do not support the hypothesis that adult animals maintain a patent airway during swallowing. Instead, the epiglottis in nonhuman mammals downfolds similarly to that of adult humans during swallowing. (C) 1996 Wiley-Liss, Inc.