Upper esophageal sphincter
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Overview
| Upper esophageal sphincter | |
|---|---|
 | |
| Muscles of the pharynx and cheek. (Constrictor pharyngis inferior visible at bottom left.) | |
 | |
| Sagittal section of nose mouth, pharynx, and larynx. (Upper esophageal sphincter not labeled, but region is visible.) | |
| MeSH | Upper+Esophageal+Sphincter |
| Dorlands/Elsevier | s_18/12748533 |
The upper esophageal sphincter (UES) refers to the superior portion of the esophagus.
Unlike the lower esophageal sphincter, it is comprised of striated muscle and is under conscious control. The primary muscle of the UES is the cricopharyngeus portion of the inferior pharyngeal constrictor.[1]
References
External links
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
