The palatoglossal muscle is a muscle of the soft palate and an extrinsic muscle of the tongue. Its surface is covered by oral mucosa and forms the visible palatoglossal arch.
Palatoglossus muscle
The mouth cavity seen from anterior view. The palatoglossus muscle is beneath the glossopalatine arch (labeled at upper right)
Dissection of the muscles of the palate from behind. (palatoglossus muscle not labeled)
From its origin, it passes anteroinferiorly and laterally. It passes anterior to the palatine tonsil.[1]
Originedit
The palatoglossus arises (the oral aspect of) the palatine aponeurosis of the soft palate, where it is continuous with its contralateral partner (i.e. the same muscle of the opposite side).[1]
Insertionedit
It inserts onto the side of the tongue; some of its fibers extend over the dorsum of the tongue, and some pass into the substance of the tongue to intermingle with the transverse muscle of tongue.[1]
It is the only muscle of the tongue not innervated by the hypoglossal nerve (CN XII).[1]
Controversyedit
Some sources state that the palatoglossus is innervated by fibers from the cranial part of the accessory nerve (CN XI) that travel via the pharyngeal plexus.[2]
Other sources state that the palatoglossus is not innervated by XI hitchhiking on X, but rather it is innervated by IX via the pharyngeal plexus formed from IX and X.[3]
Actions/movementsedit
The palatoglossus elevates the root of the tongue (i.e. the posterior attached portion of the tongue[citation needed]). It approximates the ipsilateral (same side) palatoglossal arch to the contralateral (opposite side) one, thus separating the oral cavity and the oropharynx.[1]
Functionedit
It closes the oropharyngeal isthmus, and aids initiation of swallowing. This muscle also prevents the spill of saliva from vestibule into the oropharynx by maintaining the palatoglossal arch.
Referencesedit
This article incorporates text in the public domain from page 1139 of the 20th edition ofGray's Anatomy(1918)
^ abcdefStandring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42th ed.). New York. p. 710. ISBN978-0-7020-7707-4. OCLC 1201341621.{{cite book}}: CS1 maint: location missing publisher (link)
^Section 3, Chapter 35 - Neck and Upper Aerodigestive Tract - Pharynx. In: Standring, S, editors. Gray's Anatomy: The Anatomical Basis of Clinical Practice, 39th Edition. London: Elsevier; 2008. p628
^Chapter 8 Head and Neck. In: Drake RL, Vogl W, Mitchell AWM, editors. Gray's Anatomy for Students. London: Elsevier; 2005. p991
External linksedit
. Roche Lexicon - illustrated navigator. Elsevier. Archived from the original on 2014-01-01.
palatoglossus, muscle, palatoglossal, muscle, muscle, soft, palate, extrinsic, muscle, tongue, surface, covered, oral, mucosa, forms, visible, palatoglossal, arch, mouth, cavity, seen, from, anterior, view, palatoglossus, muscle, beneath, glossopalatine, arch,. The palatoglossal muscle is a muscle of the soft palate and an extrinsic muscle of the tongue Its surface is covered by oral mucosa and forms the visible palatoglossal arch Palatoglossus muscleThe mouth cavity seen from anterior view The palatoglossus muscle is beneath the glossopalatine arch labeled at upper right Dissection of the muscles of the palate from behind palatoglossus muscle not labeled DetailsOriginPalatine aponeurosisInsertionTongueNerveVagus nerve via pharyngeal branch to pharyngeal plexus ActionsRaising the back part of the tongueIdentifiersLatinMusculus palatoglossusTA98A05 1 04 110TA22131FMA46697Anatomical terms of muscle edit on Wikidata Contents 1 Structure 1 1 Origin 1 2 Insertion 1 3 Innervation 1 3 1 Controversy 1 4 Actions movements 2 Function 3 References 4 External linksStructure editFrom its origin it passes anteroinferiorly and laterally It passes anterior to the palatine tonsil 1 Origin edit The palatoglossus arises the oral aspect of the palatine aponeurosis of the soft palate where it is continuous with its contralateral partner i e the same muscle of the opposite side 1 Insertion edit It inserts onto the side of the tongue some of its fibers extend over the dorsum of the tongue and some pass into the substance of the tongue to intermingle with the transverse muscle of tongue 1 Innervation edit The palatoglossus muscle receives motor innervation from the pharyngeal plexus of vagus nerve 1 It is the only muscle of the tongue not innervated by the hypoglossal nerve CN XII 1 Controversy edit Some sources state that the palatoglossus is innervated by fibers from the cranial part of the accessory nerve CN XI that travel via the pharyngeal plexus 2 Other sources state that the palatoglossus is not innervated by XI hitchhiking on X but rather it is innervated by IX via the pharyngeal plexus formed from IX and X 3 Actions movements edit The palatoglossus elevates the root of the tongue i e the posterior attached portion of the tongue citation needed It approximates the ipsilateral same side palatoglossal arch to the contralateral opposite side one thus separating the oral cavity and the oropharynx 1 Function editIt closes the oropharyngeal isthmus and aids initiation of swallowing This muscle also prevents the spill of saliva from vestibule into the oropharynx by maintaining the palatoglossal arch References edit nbsp This article incorporates text in the public domain from page 1139 of the 20th edition of Gray s Anatomy 1918 a b c d e f Standring Susan 2020 Gray s Anatomy The Anatomical Basis of Clinical Practice 42th ed New York p 710 ISBN 978 0 7020 7707 4 OCLC 1201341621 a href Template Cite book html title Template Cite book cite book a CS1 maint location missing publisher link Section 3 Chapter 35 Neck and Upper Aerodigestive Tract Pharynx In Standring S editors Gray s Anatomy The Anatomical Basis of Clinical Practice 39th Edition London Elsevier 2008 p628 Chapter 8 Head and Neck In Drake RL Vogl W Mitchell AWM editors Gray s Anatomy for Students London Elsevier 2005 p991External links edit Anatomy diagram 05287 011 1 Roche Lexicon illustrated navigator Elsevier Archived from the original on 2014 01 01 Portal nbsp Anatomy Retrieved from https en wikipedia org w index php title Palatoglossus muscle amp oldid 1165862613, wikipedia, wiki, book, books, library,
