Inspiratory coactivation of the genioglossus enlarges retroglossal space in laryngectomized humans
Inspiratory coactivation of the genioglossus enlarges retroglossal space in laryngectomized humans
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DOI：
10.1152/jappl.1996.80.5.1595
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发表时间：
1996-05-01
影响因子：
3.3
通讯作者：
Guz, A
中科院分区：
文献类型：
--
作者：
Kobayashi, I;Perry, A;Guz, A
为了探讨颏舌肌电活动（GG-EMG）与相关舌头运动之间的关系，对七名通过气管造口呼吸（上呼吸道没有压力或流量变化）的喉切除受试者在仰卧位进行了研究。在1）自主吸气（SI）、2）阻力负荷吸气（LI）和3）快速吸气（RI）期间，同时监测舌运动（使用侧位透视）和GG-EMG（表示为最大自主颏舌激活的百分比）。在每一个动作的舌头的位置进行了比较，其位置在自主呼气。在三个动作期间的峰值GG-EMG彼此显著不同（SI：5.4 + 1.6，LI：11.9 +/- 1.8，和RI：51.6 +/- 9.4（SE）%）。在SI期间，舌后部的相关向前运动最小;然而，在LI期间观察到显著的运动，并且在RI期间增加。峰值GG-EMG和这种运动之间存在显著的协方差。颏舌肌与吸气的共同激活扩大了舌咽气道，特别是在其尾部。在具有完整上气道的受试者中，这种激活可以以努力依赖性方式保护或增强上气道通畅性。
To investigate the relationship between the electrical activity of the genioklossus (GG-EMG) and associated tongue movement, seven laryngectomized subjects breathing through a tracheal stoma (without pressure or flow change in the upper airway) were studied in the supine position. Tongue movement, with the use of lateral fluoroscopy, and GG-EMG expressed as a percentage of maximum voluntary genioglossal activation were monitored simultaneously during 1) spontaneous inspiration (SI), 2) resistive loaded inspiration (LI), and 3) rapid inspiration (RI). Tongue position during each maneuver was compared with its position during spontaneous expiration. Peak GG-EMG during the three maneuvers was significantly different from each other (SI: 5.4 + 1.6, LI: 11.9 +/- 1.8, and RI: 51.6 +/- 9.4 (SE) %, respectively). Associated forward movement of the posterior aspect of the tongue was minimum during SI; however, significant movement was observed during LI, and this was increased during RI. Significant covariance existed between peak GG-EMG and this movement. Genioglossal coactivation with inspiration enlarges the glossopharyngeal airway particularly in its caudal part. In subjects with intact upper airways, this activation may protect or enhance upper airway patency in an effort-dependent manner.