Esophageal Sphincter, Lower

The physiologic or functional barrier to GASTROESOPHAGEAL REFLUX at the esophagogastric junction. Sphincteric muscles remain tonically contracted during the resting state and form the high-pressure zone separating the lumen of the ESOPHAGUS from that of the STOMACH. (Haubrich et al, Bockus Gastroenterology, 5th ed., pp399, 415)

Year introduced: 2005

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Tree Number(s): A02.633.570.210, A03.556.875.500.414.350, A03.556.875.875.330.350

MeSH Unique ID: D049630

Entry Terms:

• Sphincter, Lower Esophageal
• Gastroesophageal Sphincter
• Gastroesophageal Sphincters
• Sphincter, Gastroesophageal
• Lower Esophageal Sphincter

Previous Indexing:

• Esophagogastric Junction (1966-2004)

See Also:

• Gastroesophageal Reflux

All MeSH Categories
Anatomy Category
Musculoskeletal System
Muscles
Muscle, Smooth
Esophageal Sphincter, Lower

All MeSH Categories
Anatomy Category
Digestive System
Gastrointestinal Tract
Upper Gastrointestinal Tract
Esophagus
Esophagogastric Junction
Esophageal Sphincter, Lower

All MeSH Categories
Anatomy Category
Digestive System
Gastrointestinal Tract
Upper Gastrointestinal Tract
Stomach
Esophagogastric Junction
Esophageal Sphincter, Lower