Contraction and relaxation of upper airway muscles during expiratory application of negative pressure at the mouth.

@article{Sanna1994ContractionAR,
  title={Contraction and relaxation of upper airway muscles during expiratory application of negative pressure at the mouth.},
  author={Antonio Sanna and Claude Veriter and Alexander Kurtansky and Dan Stanescu},
  journal={Sleep},
  year={1994},
  volume={17 3},
  pages={220-5}
}
Upper airway muscles (UAM) are activated during inspiration, but little is known about their activity during expiration. We studied six healthy volunteers in supine position. Negative pressure (-10 to -30 cm H2O) was applied cyclically at the mouth during expiration. Subjects actively breathed during inspiration and either contracted or relaxed their UAM during expiration. Supraglottic pressure (Psg) was measured with a catheter with the tip at the supraglottic level. During relaxation, but not… CONTINUE READING

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