Medicine:Musculus uvulae
| Musculus uvulae | |
|---|---|
 | |
| Details | |
| Origin | Posterior nasal spine and palatine aponeurosis |
| Insertion | Uvula |
| Nerve | Vagus nerve (via pharyngeal plexus) |
| Actions | Retracts the uvula |
| Identifiers | |
| Latin | musculus uvulae,[1][2] musculus azygos uvulae,[2] uvularis[2] |
| Anatomical terms of muscle | |
The musculus uvulae[1] (also muscle of uvula, uvular muscle, or palatouvularis muscle[2]) is a bilaterally muscle of the soft palate (one of five such muscles) that acts to shorten the uvula when both muscles contract.[3] It forms most of the mass of the uvula.[2] It is innervated by the pharyngeal plexus of vagus nerve (cranial nerve X).[3][4]
Anatomy
The muscle is situated in between the two laminae of the palatine aponeurosis. From its origin, it passes posterior-ward superior to the swing that is formed by the levator veli palatini muscle. The musculus uvulae and levator veli palatini muscle form a right angle so that their contraction elevates the levator eminence to aid in separating the oral cavity and the oropharynx.[4]
Origin
The muscle arises from the posterior nasal spine of the palatine bone, and the (superior aspect of the[4]) palatine aponeurosis.[3][4]
Insertion
The muscle inserts into the mucous membrane of the uvula.[3][4]
Vasculature
The muscle receives arterial blood from the ascending palatine artery, and the descending palatine artery.[4]
Actions/movements
Bilateral contraction of the two muscles shortens the uvula.[3] It also elevates[2] and retracts[4] the uvula.
Unilateral contraction draws the uvula ipsilaterally.[3]
Function
By retracting the uvula and thickening the middle portion of the soft palate, the muscle assist the levator veli palatini in separating the oral cavity and the oropharynx.[4]
References
- ↑ 1.0 1.1 "Anatonomina". http://www.terminologia-anatomica.org/en/Terms/Occurence/2476.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 "Musculus uvulae muscle". https://medical-dictionary.thefreedictionary.com/Musculus+uvulae+muscle.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Helwany, Muhammad; Rathee, Manu (2023), "Anatomy, Head and Neck, Palate", StatPearls (Treasure Island (FL): StatPearls Publishing), PMID 32491749, http://www.ncbi.nlm.nih.gov/books/NBK557817/, retrieved 2023-07-17
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42th ed.). New York. pp. 710–711. ISBN 978-0-7020-7707-4. OCLC 1201341621. https://www.worldcat.org/oclc/1201341621.
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