Video 5 - Glottal function during belching.
From the following article
Reflex interaction of pharynx, esophagus, and airways
Reza Shaker
GI Motility online (2006)
doi:10.1038/gimo11
Videoendoscopic demonstration of belching triggered by intraesophageal air injection through a catheter seen at the 6 o'clock position.
Glottal function during belching consists of the following sequences: (1) vocal cord adduction concurrent with adduction of arytenoids, resulting in full closure of the introitus to the trachea before the UES relaxes or opens; (2) anterior/caudad movement of the glottis; and (3) opening of the UES that is either slit-like or triangular.
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