Suratt P M, McTier R, Wilhoit S C
J Appl Physiol (1985). 1985 Apr;58(4):1252-6. doi: 10.1152/jappl.1985.58.4.1252.
The alae nasi is an accessible dilator muscle of the upper airway located in the nose. We measured electromyograms (EMG) of the alae nasi to determine the relationship between their activity and timing to contraction of the rib cage muscles and diaphragm during obstructive apnea in nine patients. Alae nasi EMG were measured with surface electrodes and processed to obtain a moving time average. Contraction of the rib cage and diaphragm during apneas was detected with esophageal pressure. During non-rapid-eye-movement (NREM) sleep, there was a significant correlation in each patient between alae nasi EMG activity and the change in esophageal pressure. During rapid-eye-movement (REM) sleep, correlations were significantly lower than during NREM sleep. As the duration of each apnea increased, the activation of alae nasi EMG occurred progressively earlier than the change in esophageal pressure. We conclude that during obstructive apneas in NREM sleep, activity of the alae nasi increases when diaphragm and rib cage muscle force increases and the activation occurs earlier as each apneic episode progresses.
鼻翼是位于鼻腔内的上呼吸道可触及的扩张肌。我们测量了9名患者鼻翼的肌电图（EMG），以确定在阻塞性呼吸暂停期间，鼻翼活动与胸廓肌肉和膈肌收缩时间之间的关系。使用表面电极测量鼻翼EMG，并进行处理以获得移动时间平均值。通过食管压力检测呼吸暂停期间胸廓和膈肌的收缩情况。在非快速眼动（NREM）睡眠期间，每位患者的鼻翼EMG活动与食管压力变化之间存在显著相关性。在快速眼动（REM）睡眠期间，相关性显著低于NREM睡眠期间。随着每次呼吸暂停持续时间的增加，鼻翼EMG的激活比食管压力变化逐渐提前发生。我们得出结论，在NREM睡眠期间的阻塞性呼吸暂停期间，当膈肌和胸廓肌肉力量增加时，鼻翼的活动增加，并且随着每次呼吸暂停发作的进展，激活提前发生。
