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首页> 外文期刊>Journal of oral rehabilitation >Inter-individual variation of bolus properties in triggering swallowing during chewing in healthy humans
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Inter-individual variation of bolus properties in triggering swallowing during chewing in healthy humans

机译：在健康人体咀嚼过程中吞咽吞咽过程中吞咽的间间变化

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Background There is a wide variation of chewing behaviours even in healthy humans. The present study was aimed to clarify how the rheological properties of the bolus during chewing are different among individuals. We also investigated whether the swallowing threshold was consistent among the individuals and whether the difference in the bolus properties at the swallowing affected swallowing movement. Methods Twenty-nine healthy volunteers were asked to ingest 8 g of steamed rice. Based on the chewing duration defined by the time until first swallow, participants were asked to chew the food and then either spit it out or swallow it at 50%, 100% and 150% of chewing duration. In seven volunteers, the maximum bite force was measured. Results The hardness of the bolus gradually decreased throughout recording. Although the chewing duration varied widely, there was a significant negative correlation between time and hardness, regardless of the difference in individual chewing duration. The cohesiveness of the bolus was unchanged at the 100% time point, followed by a slight but significant increase. There was no significant correlation between the chewing duration and adhesiveness of the bolus. Swallowing-related bursts of Supra and Infra EMGs were not related to the chewing duration or bolus properties, and chewing duration did not affect swallowing function. Conclusion The current results suggest that the bolus properties such as the hardness and cohesiveness during chewing are just dependent on the chewing duration and the difference in the bolus properties does not affect the swallowing initiation and movement.
机译：即使在健康人中，咀嚼行为也有很大的差异。本研究旨在阐明咀嚼过程中药丸的流变特性在个体之间的差异。我们还调查了个体之间的吞咽阈值是否一致，以及吞咽时丸性质的差异是否影响吞咽运动。方法29名健康志愿者被要求摄入8g蒸米饭。根据第一次吞咽之前的咀嚼时间，参与者被要求咀嚼食物，然后吐出来，或者以咀嚼时间的50%、100%和150%吞咽。在七名志愿者中，测量了最大咬合力。结果在整个记录过程中，药丸的硬度逐渐降低。尽管咀嚼持续时间差异很大，但无论个体咀嚼持续时间的差异如何，时间和硬度之间存在显著的负相关。在100%的时间点，丸剂的内聚性没有变化，随后轻微但显著增加。咀嚼时间和丸的粘附性之间没有显著相关性。吞咽相关的上下肌电图爆发与咀嚼持续时间或丸性质无关，咀嚼持续时间不影响吞咽功能。结论目前的研究结果表明，咀嚼过程中的团块性质，如硬度和内聚性，仅取决于咀嚼持续时间，团块性质的差异不影响吞咽起始和运动。

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