upper esophageal sphincter

pharyngoesophageal sphincter

The upper esophageal sphincter (UES) (also called the Pharyngoesophageal sphincter) refers to the superior portion of the esophagus. Unlike the lower esophageal sphincter, it consists of striated muscle and is under conscious control. The primary muscle of the UES is the cricopharyngeus portion of the inferior pharyngeal constrictor. During swallowing the upper esophageal sphincter opens so the bolus can pass into the esophagus. A secondary role of the UES is to reduce backflow from the esophagus into the pharynx.

Type Muscle
Parent Structure striated muscle sphincter
Latin Name pharyngoesophageal sphincter
FMA ID 265203

Frequently Asked Questions

What is the upper esophageal sphincter?
The upper esophageal sphincter (UES) (also called the Pharyngoesophageal sphincter) refers to the superior portion of the esophagus. Unlike the lower esophageal sphincter, it consists of striated muscle and is under conscious control. The primary muscle of the UES is the cricopharyngeus portion of t
What is the Latin name for the upper esophageal sphincter?
The Latin name for the upper esophageal sphincter is pharyngoesophageal sphincter.

Related Structures

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