Fig. 2
From: Cricopharyngeal myotomy for cricopharyngeus muscle dysfunction after esophagectomy
Swallow functional test before cricopharyngeal myotomy. a Laryngeal penetration occurred during laryngeal elevation in the pharyngeal phase. b The bolus did not pass entirely through the upper esophageal sphincter in the esophageal phase. c Breathing was reinitiated with a massive amount of pharyngeal residue. Yellow arrow; Hyoid bone, Blue arrow; Esophageal orifice