Genioglossal muscle response to CO2 stimulation during NREM sleep

被引:61
|
作者
Lo, YL
Jordan, AS
Malhotra, A
Wellman, A
Heinzer, RC
Schory, K
Dover, L
Fogel, RB
White, DP
机构
[1] Chang Gang Mem Hosp, Dept Thorac Med, Taipei, Taiwan
[2] Harvard Univ, Sch Med, Brigham & Womens Hosp, Div Sleep Med, Boston, MA USA
[3] CHUV, Serv Pneumol, Lausanne, Switzerland
[4] Merck & Co Inc, Resp & Allergy Div, Rahway, NJ USA
关键词
genioglossus; hypercapnia; sleep; upper airway; pharynx; continuous positive airway pressure; respiration;
D O I
10.1093/sleep/29.4.470
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
Study Objectives: The objective was to evaluate the responsiveness of upper airway muscles to hypercapnia with and without intrapharyngeal negative pressure during non-rapid eye movement (NREM) sleep and wakefulness. Design: We assessed the genioglossal muscle response to CO2 off and on continuous positive airway pressure (CPAP) (to attenuate negative pressure) during stable NREM sleep and wakefulness in the supine position. Setting: Laboratory of the Sleep Medicine Division, Brigham and Women's Hospital. Patients or Participants: Eleven normal healthy subjects. Interventions: During wakefulness and NREM sleep, we measured genioglossal electromyography (EMG) on and off CPAP at the normal eupneic level and at levels 5 and 10 mm Hg above the awake eupneic level. Measurements and Results: We observed that CO 2 could increase upper-airway muscle activity during NREM sleep and wakefulness in the supine position with and without intrapharyngeal negative pressure. The application of nasal CPAP significantly decreased genioglossal EMG at all 3 levels of PETCO2 during NREM sleep (13.0 +/- 4.9% vs. 4.6 +/- 1.6% of maximal EMG, 14.6 +/- 5.6% vs. 7.1 +/- 2.3% of maximal EMG, and 17.3 +/- 6.3% vs, 10.2 +/- 3.1 % of maximal EMG, respectively). However, the absence of negative pressure in the upper airway did not significantly affect the slope of the pharyngeal airway dilator muscle response to hypercapnia during NREM sleep (0.72 +/- 0.30% vs. 0.79 +/- 0.27% of maximal EMG per mm Hg PCO2, respectively, off and on CPAP). Conclusions: We conclude that both chemoreceptive and negative pressure reflex inputs to this upper airway dilator muscle are still active during stable NREM sleep.
引用
收藏
页码:470 / 477
页数:8
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