Correlation between genioglossal and diaphragmatic responses to hypercapnia during sleep.


Oropharyngeal patency during sleep is dependent on the dilating force of the genioglossus, the main tongue protrusor muscle. We measured the ventilatory (Vl), diaphragmatic (EMGdi), and genioglossal (EMGgg) electromyographic responses to CO2 in awake and sleeping goats; delta Vl/delta PETCO2 decreased from awake (0.85 +/- 0.087 L/min/mm Hg) to NREM sleep (0… (More)


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