Figure 1 - Normal swallowing events in a young male viewed fluoroscopically.

a: Bolus hold position, glossopalatal seal maintained. b: Tongue tip elevation, soft palate elevates to closure, and bolus passes mandible ramus. c: Bolus moves posteriorly as tongue moves backward, hyoid and larynx begin to ascend, and epiglottis tilting. d: Larynx closed, epiglottis inverted, UES begins to open. e: Pharynx constricts, tongue base against pharynx, maximum hyoid elevation, UES open. f: Bolus tail through UES, structures returning to rest.