Electrical activity from the superior pharyngeal constrictor during reflexive and nonreflexive tasks.
Electrical activity from the superior pharyngeal constrictor during reflexive and nonreflexive tasks.
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反射性和非反射性任务期间咽上缩肌的电活动。
DOI：
10.1044/jshr.3204.749
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
DuMond,CE
中科院分区：
文献类型：
--
作者：
Perlman,AL;Luschei,ES;DuMond,CE
本研究的目的是以定量的方式确定正常人受试者的上级咽缩肌中哪些非吞咽任务（如果有的话）产生显著水平的激活。将双极钩丝电极插入15名健康受试者的上级咽缩肌。控制电极放置。每个受试者进行两个反射任务，六个自愿任务，需要发声，和四个非言语自愿任务。对肌电图进行校正和积分。然后通过取其自然对数来转换得到的数字。进行ANOVA并估计线性模型。肌电活动的大小与电极的位置有关。最大值记录在外侧-上方放置，其次是外侧-下方、内侧-下方和内侧-上方。发现上级咽收缩肌是主要在反射活动期间激活的肌肉。肌电活动的幅度与任务的关系有一个总的趋势。吞咽产生了最大量的活动，并且呕吐物产生了吞咽产生的活动的约60%。两个任务，即产生音素/k/被强调的作品/hk/，以及"修改的Valsalva"，实际上是一个硬的/k/保持几秒钟，产生了下一个最高水平的EMG。
The purpose of this investigation was to determine, in a quantitative manner, which, if any, nonswallowing tasks produce significant levels of activation in the superior pharyngeal constrictor muscle of normal human subjects. Bipolar hooked wire electrodes were inserted in the superior pharyngeal constrictor muscle of 15 healthy subjects. Electrode placement was controlled. Each subject performed two reflexive tasks, six voluntary tasks requiring phonation, and four nonspeech voluntary tasks. The electromyogram (EMG) was rectified and integrated. The resulting number was then transformed by taking its natural logarithm. An ANOVA was performed and a linear model was estimated. The magnitude of the EMG activity was related to the location of the electrodes. The largest values were recorded in the lateral-superior placement, followed by the lateral-inferior, medial-inferior and medial-superior. The superior pharyngeal contrictor was found to be a muscle activated primarily during reflexive activity. There was a general trend in the amplitude of EMG activity in relationship to task. Swallowing produced the greatest amount of activity and a gag produced about 60% of the activity produced by the swallow. Two tasks, production of the work /hk/ in which the phoneme /k/ was stressed, and a "modified Valsalva," which was actually a hard /k/ held for several seconds, produced the next greatest level of EMG.