Motor strategy in rapid sequential swallowing: New insights
Motor strategy in rapid sequential swallowing: New insights
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DOI：
10.1044/jslhr.4306.1481
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发表时间：
2000-12-01
影响因子：
2.6
通讯作者：
Sonies, BC
中科院分区：
文献类型：
--
作者：
Chi-Fishman, G;Sonies, BC
本研究探讨了同步视频透视（VFS）和颏下表面肌电图（EMG）过程中正常、快速顺序吞咽的生理特性和运动策略。10名受试者进行离散（5和15毫升）和顺序（150毫升在倾斜和直立的头部姿势）吞咽任务。分析包括VFS事件定时、运动/大剂量通过特征、EMG振幅波形以及峰值和偏移EMG振幅。结果表明，连续吞咽在几个VFS事件持续时间显着短于离散吞咽，但在咽部运输和阶段过渡时间显着较长。在连续吞咽过程中，VFS上的舌咽系统表现出周期性的“上升和部分下降”运动模式，对应于EMG上重复的“激活和部分失活”特征。在6/10例受试者中发现连续吞咽比离散吞咽的EMG峰值幅度更大。在VFS的一些受试者中也观察到咽团合并、预备喉手势和无抽吸的穿透。受试者之间的差异是显着的时间措施和肌电图振幅。我们的研究结果的个体差异和特定主题的任务适应策略支持的概念，内置的可塑性在吞咽运动复合体。
This study examined the physiological properties and movement strategies of normal, rapid sequential swallowing during simultaneous videofluoroscopy (VFS) and submental surface electromyography (EMG). Ten subjects performed discrete (5 and 15 cc) and sequential (150 cc in tilted and upright head postures) swallowing tasks. Analyses included VFS event timing, movement/bolus passage characteristics, EMG amplitude waveforms, and peak and offset EMG amplitudes. Results revealed that sequential swallows were significantly shorter than discrete swallows in several VFS event durations, but significantly longer in pharynaeal transit and stage transition times. The hyolaryngeal system exhibited a cyclical "rise and partial fall" movement pattern during sequential swallows on VFS, corresponding to a repetitive "activation and partial deactivation" characteristic on EMG. Greater peak EMG amplitude for sequential than discrete swallows was found in 6/10 subjects. Pharyngeal bolus merging, preparatory laryngeal gestures, and penetration without aspiration were also observed in some subjects on VFS. Intersubject differences were significant in timing measures and EMG amplitude. Our Findings of individual variability and subject-specific strategies for task accommodation support the notion of built-in plasticity in the deglutitive motor complex.