Management of Oropharyngeal Dysphagia in Laryngeal and Hypopharyngeal Cancer
Figure 3
Normal swallowing. The sequence of the phases of deglutition is demonstrated in still pictures of a videofluoroscopic examination. (a) Normal anatomy at rest. (b) The contrast is introduced in the mouth with a syringe. (c) Oral phase, bolus preparation. (d) Bolus posterior propulsion. (e) The pharyngeal phase is triggered when the bolus enters the oropharynx. (f) Laryngeal closure. (g) Opening of the upper esophageal sphincter. (h) and (i) Esophageal phase. Note that it takes less than a second to complete the transit of the bolus through the pharynx.
