Nagy Ahmed, Molfenter Sonja M, Péladeau-Pigeon Melanie, Stokely Shauna, Steele Catriona M
Toronto Rehabilitation Institute, University Health Network, Toronto, ON, Canada M5G 2A2 ; University of Fayoum, Fayoum 63514, Egypt.
Toronto Rehabilitation Institute, University Health Network, Toronto, ON, Canada M5G 2A2 ; New York University, New York, NY 10012, USA.
Biomed Res Int. 2014;2014:738971. doi: 10.1155/2014/738971. Epub 2014 Mar 23.
Hyoid movement in swallowing is biomechanically linked to closure of the laryngeal vestibule for airway protection and to opening of the upper esophageal sphincter. Studies suggest that the range of hyoid movement is highly variable in the healthy population. However, other aspects of hyoid movement such as velocity remain relatively unexplored. In this study, we analyze data from a sample of 20 healthy young participants (10 male) to determine whether hyoid movement distance, duration, velocity, and peak velocity vary systematically with increases in thin liquid bolus volume from 5 to 20 mL. The temporal correspondence between peak hyoid velocity and laryngeal vestibule closure was also examined. The results show that maximum hyoid position and peak velocity increase significantly for 20 mL bolus volumes compared to smaller volumes, and that the timing of peak velocity is closely linked to achieving laryngeal vestibule closure. This suggests that generating hyoid movements with increased power is a strategy for handling larger volumes.
吞咽时舌骨的运动在生物力学上与喉前庭关闭以保护气道以及食管上括约肌开放相关联。研究表明，健康人群中舌骨运动的范围差异很大。然而，舌骨运动的其他方面，如速度，仍相对未被充分研究。在本研究中，我们分析了20名健康年轻参与者（10名男性）的样本数据，以确定随着稀薄液体团块体积从5毫升增加到20毫升，舌骨运动距离、持续时间、速度和峰值速度是否会系统性地变化。我们还检查了舌骨峰值速度与喉前庭关闭之间的时间对应关系。结果表明，与较小体积相比，20毫升团块体积时舌骨的最大位置和峰值速度显著增加，并且峰值速度的时间与实现喉前庭关闭密切相关。这表明产生更大力量的舌骨运动是处理更大体积食物的一种策略。
