upper esophageal sphincter


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Related to upper esophageal sphincter: lower esophageal sphincter

upper esophageal sphincter

A sphincter that keeps the opening between the posterior pharynx and the proximal esophagus closed, except during swallowing. It is maintained principally by the cricopharyngeal muscle.
See also: sphincter
References in periodicals archive ?
Alteration of the upper esophageal sphincter belch reflex in patients with achalasia.
Globus sensation is associated with hypertensive upper esophageal sphincter but not with gastroesophageal reflux.
Gabb et al., "Influence of normal aging on oral-pharyngeal and upper esophageal sphincter function during swallowing," The American Journal of Physiology: Gastrointestinal and Liver Physiology, vol.
Pharyngeal and upper esophageal sphincter (UES) manometry provides the clinician with an objective means of measuring pharyngeal and UES coordination and quantitative pressures.
Then, 15-20 mL of a 3.0% Lugol's iodine solution was sprayed over the entire esophageal mucosa with a spraying catheter (Olympus PW-205V), moving from the lower to the upper esophageal sphincter over the course of 20 seconds.
A difficult passage through the upper esophageal sphincter should alert the examiner to the possibility of a hypertonic sphincter or a Zenker's diverticulum.
The patient underwent bougie (60 French Maloney) dilation of the upper esophageal sphincter. Postoperatively, the patient was treated with transcutaneous electrical stimulation.

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