Video 2 - Comparison of primary and pharyngeal reflexive swallow.

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Swallows triggered by direct stimulation of the pharynx are different from volitional or primary swallows by not inducing sequential contact of the proximal tongue with the hard palate known to occur during primary swallows. For this reason reflexive swallow does not result in transit of the oral bolus while it clears the pharynx. Both types of swallows are shown in real time followed by slow motion.