Figure 1 - Illustrations of disordered oropharyngeal swallowing.

Panel 1 shows bolus of barium in the oral cavity due to patient not being able to initiate a swallow. Panel 2 shows nasopharyngeal regurgitation due to failure of velopharyngeal closure. Panel 3 shows aspiration of barium into the larynx and trachea. Panel 4 shows residual barium in the vallecula (space between the posterior aspect of the tongue and the epiglottis). (Source: From the AGA Clinical Teaching Project, with permission from American Gastroenterology Association).