Hamlet S L
Dysphagia. 1989;4(3):136-45. doi: 10.1007/BF02408036.
This investigation concerned the effect of different bolus volumes on the characteristics of lingual propulsive activity in swallowing. Young normal subjects were asked to perform dry swallows and swallows of 5, 10, and 15 ml of water. Tongue activity was recorded by tracking multiple gold pellets affixed to the tongue, utilizing the specialized research capabilities of the X-ray Microbeam facility at the University of Wisconsin. The major differences were between dry and liquid swallows, with dry swallows showing smaller range of movement, higher tongue position at the initiation of lingual propulsive activity, a slightly different direction of motion, a humped or flat rather than grooved cross-sectional contour of the tongue, lower peak velocity of motion, and slower progression of activity from tongue blade to dorsum. Within the 5-15 ml range of liquid bolus volumes, fewer consistent differences were found as a function of bolus size, and some marked individual differences in swallowing patterns were seen. Data are presented on normal within-subject variability in swallowing, with discussion of the possible contribution of sensory assessment of bolus size to the modification of oral and pharyngeal characteristics of swallowing.
本研究关注不同团块体积对吞咽时舌推进活动特征的影响。年轻的正常受试者被要求进行干吞以及吞咽5毫升、10毫升和15毫升水。利用威斯康星大学X射线微束设备的专门研究能力，通过追踪附着在舌上的多个金颗粒来记录舌的活动。主要差异存在于干吞和液体吞咽之间，干吞表现为运动范围较小、舌推进活动开始时舌位置较高、运动方向略有不同、舌的横截面轮廓呈驼峰状或扁平状而非凹槽状、运动峰值速度较低以及活动从舌前部向舌背推进较慢。在5 - 15毫升液体团块体积范围内，作为团块大小的函数，发现的一致性差异较少，并且在吞咽模式中观察到一些明显的个体差异。文中呈现了正常受试者吞咽时的个体内变异性数据，并讨论了团块大小的感觉评估对吞咽的口腔和咽部特征改变可能产生的影响。
