Middle pharyngeal constrictor muscle
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| Middle pharyngeal constrictor muscle | ||
|---|---|---|
| Muscles of the pharynx and cheek. (Constrictor pharyngis medius labeled at center left.) | ||
 | ||
| Muscles of the pharynx, viewed from behind, together with the associated vessels and nerves. (Mid. constr. labeleda at center.) | ||
| Latin | musculus constrictor pharyngis medius | |
| Gray's | subject #244 1143 | |
| Origin: | hyoid bone | |
| Insertion: | pharyngeal raphe | |
| Artery: | ||
| Nerve: | Vagus nerve | |
| Action: | Swallowing | |
| Dorlands/Elsevier | m_22/12548641 | |
The middle pharyngeal constrictor is a fanshaped muscle, smaller than the Inferior pharyngeal constrictor muscle.
Origin and insertion
It arises from the whole length of the upper border of the greater cornu of the hyoid bone, from the lesser cornu, and from the stylohyoid ligament.
The fibers diverge from their origin: the lower ones descend beneath the Constrictor inferior, the middle fibers pass transversely, and the upper fibers ascend and overlap the Constrictor superior.
It is inserted into the posterior median fibrous raphé, blending in the middle line with the muscle of the opposite side.
Action
As soon as the bolus of food is received in the pharynx, the elevator muscles relax, the pharynx descends, and the constrictores contract upon the bolus, and convey it downward into the esophagus.
Additional images
 Hyoid bone. Anterior surface. Enlarged. |
 Muscles of the neck. Lateral view. |
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 As such, some of the information contained herein may be outdated.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 .
