Stylopharyngeus muscle
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| Stylopharyngeus muscle | ||
|---|---|---|
| Muscles of the pharynx and cheek. (Stylopharyngeus visible at center left.) | ||
| Latin | musculus stylopharyngeus | |
| Gray's | subject #244 1143 | |
| Origin: | Styloid process (temporal) | |
| Insertion: | thyroid cartilage (pharynx) | |
| Artery: | ||
| Nerve: | glossopharyngeal nerve | |
| Action: | elevate the larynx, elevate the pharynx, swallowing | |
| MeSH | Pharyngeal+Muscles | |
| Dorlands/Elsevier | m_22/12550987 | |
The stylopharyngeus is a muscle in the head that stretches between the styloid process and the pharynx.
Contents |
Structure
The stylopharyngeus is a long, slender muscle, cylindrical above, flattened below. It arises from the medial side of the base of the styloid process, passes downward along the side of the pharynx between the superior pharyngeal constrictor and the middle pharyngeal constrictor, and spreads out beneath the mucous membrane.
Some of its fibers are lost in the constrictor muscles, while others, joining with the palatopharyngeus muscle, are inserted into the posterior border of the thyroid cartilage.
The glossopharyngeal nerve runs on the lateral side of this muscle, and crosses over it to reach the tongue.
Innervation
This is the only muscle in the pharynx innervated by the glossopharyngeal nerve (CN IX) and is done by its motor branch which supplies special viceral efferent fibers to it.
Actions
The stylopharyngeus:
- elevates the larynx
- elevates the pharynx
- dilates the pharynx to permit the passage of a large food bolus, so facilitating swallowing
Embryological Origin
Third Pharyngeal Arch
See also
Additional images
 Left temporal bone. Inferior surface. |
 The cartilages of the larynx. Posterior view. |
 Side view of the larynx, showing muscular attachments. |
 Extrinsic muscles of the tongue. Left side. |
 Muscles of the pharynx, viewed from behind, together with the associated vessels and nerves. |
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 As such, some of the information contained herein may be outdated.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.
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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 .
