Video 3 - Normal airway closure at the onset of the swallow.

The first three swallows show normal airway closure. Note the arytenoids mark the onset of the swallow and cover the glottis before the vocal folds fully adduct. Normal airway closure at the onset of the swallow is seen if the subject holds his breath tightly before he swallows (the supra-superglottic swallow). Note the vocal folds actively adduct in this condition prior to the swallow.