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| Palatoglossus muscle | |
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| Dissection of the muscles of the palate from behind. | |
| Latin | musculus palatoglossus |
| Gray's | subject #243 1139 |
| Origin | palatine aponeurosis |
| Insertion | tongue |
| Artery | |
| Nerve | vagus nerve and cranial accessory nerve (CN XI) |
| Action | raising the back part of the tongue |
| Dorlands /Elsevier |
m_22/12550045 |
The palatoglossus, glossopalatinus, or palatoglossal muscle is a small fleshy fasciculus, narrower in the middle than at either end, forming, with the mucous membrane covering its surface, the glossopalatine arch.
It arises from the anterior surface of the soft palate, where it is continuous with the muscle of the opposite side, and passing downward, forward, and lateralward in front of the palatine tonsil, is inserted into the side of the tongue, some of its fibers spreading over the dorsum, and others passing deeply into the substance of the organ to intermingle with the Transversus linguæ.
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Action
Elevates posterior tongue, closes the oropharyngeal isthmus, and aids initiation of swallowing.
Innervation
The palatoglossus is the only muscle of the tongue that is not innervated by the hypoglossal nerve (CN XII).
Some sources state that the palatoglossus is innervated by the accessory nerve (CN XI) that is hitchhiking on the vagus nerve (CN X) via the pharyngeal plexus.citation needed
Other sources state that the palatoglossus is not innervated by XI hitch-hicking on X, but rather it is innervated by X via the pharyngeal plexus formed from IX and X.[1]
External links
- LUC palg
- -1315307440 at GPnotebook
- Palatoglossus+muscle at eMedicine Dictionary
- Roche Lexicon - illustrated navigator, at Elsevier 05287.011-1
References
- ^ Chapter 8 Head and Neck. In: Drake RL, Vogl W, Mitchell AWM, editors. Grey's Anatomy for Students. London: Elsevier; 2005. p991
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 As such, some of the information contained herein may be outdated.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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Wikipedia content modification information:
- This page was last modified on 18 May 2008, at 19:49.
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