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Tongue acceleration in humans evoked with intramuscular electrical stimulation of genioglossus
Respiratory Physiology & Neurobiology ( IF 2.3 ) Pub Date : 2021-09-08 , DOI: 10.1016/j.resp.2021.103786
Billy L Luu 1 , Lee D Walsh 2 , Patrick P Hübner 3 , Danny J Eckert 4 , Lynne E Bilston 3 , Simon C Gandevia 3 , Jane E Butler 3
Affiliation  

Genioglossus was stimulated intramuscularly to determine the effect of regional activation of the muscle on tongue movement in eight healthy adults. Stimulation at motor threshold was delivered with a needle electrode inserted to different depths in the anterior and posterior regions of genioglossus. The current amplitude that induced muscle contraction was ∼80% higher for anterior than posterior sites. Evoked tongue movements were determined from stimulus-triggered averages (150 pulses) of the outputs from an accelerometer fixed to the posterosuperior surface of the tongue. The median amplitude [95% confidence intervals] for the resultant acceleration was 0.0 m/s2 [0.0, 0.2] for anterior and 0.6 m/s2 [0.1, 2.8] for posterior sites. There was a positive relationship between acceleration amplitude and stimulation depth in the posterior of genioglossus (p < 0.001), but acceleration amplitude did not vary with stimulation depth in the anterior region (p = 0.83). This heterogeneity in acceleration responses between muscle regions may contribute to differences in collapsibility of the upper airway.



中文翻译:

肌肉内电刺激颏舌肌诱发人类舌头加速

肌肉内刺激颏舌肌以确定肌肉的区域激活对八名健康成年人舌头运动的影响。运动阈值的刺激是通过插入颏舌肌前部和后部不同深度的针状电极进行的。诱导肌肉收缩的电流幅度对于前部比后部高约 80%。诱发舌头运动由固定在舌头后上表面的加速度计输出的刺激触发平均值(150 个脉冲)确定。合成加速度的中值幅度 [95% 置信区间] 为前部的 0.0 m/s 2 [0.0, 0.2] 和 0.6 m/s 2[0.1, 2.8] 用于后部位置。颏舌肌后部的加速度幅度与刺激深度呈正相关(p < 0.001),但加速度幅度不随前部区域的刺激深度而变化(p = 0.83)。肌肉区域之间加速反应的这种异质性可能导致上气道塌陷性的差异。

更新日期:2021-09-21
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