Palatoglossus Muscle
Table of Contents
Palatoglossus Muscle Anatomy
Structure
Palatoglossus arises from the palatine aponeurosis 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 transverse muscle of the tongue.
Origin
Palatine aponeurosis .
Insertion
Tongue.
Nerve Supply
Vagus nerve (via pharyngeal branch to pharyngeal plexus).
It is the only tongue muscle that does not get innervation from the hypoglossal nerve (CN XII).
Functions:
The root of the tongue is raised by the palatoglossus muscle.
It roughly connects the ipsilateral (same side) and contralateral (opposite side) palatoglossal arches, dividing the oropharynx from the oral cavity.
Elevates posterior tongue, closes the oropharyngeal isthmus, and aids initiation of swallowing. This muscle also prevents the spill of saliva from the vestibule into the oropharynx by maintaining the palatoglossal arch.
Raising the back part of the tongue.
FAQs
The back part of the tongue is raised by the palatoglossus muscle. Additionally, it drags the soft palate inferiorly, reducing the oropharyngeal isthmus’ diameter.
The palatoglossal muscle is an extrinsic tongue muscle and a soft palate muscle. Its surface is covered in oral mucosa, and the palatoglossal arch is visible.
The Vagus nerve (cranial nerve (CN) X/XI group) innervates the palatoglossus muscle, an extrinsic muscle.
The palatoglossus, a soft palate muscle, and the mucosa that covers it together make up the palatoglossal arch (also known as the palatoglossal fold).
Origin: The muscle originates from the palatine aponeurosis’ oral side, where it joins with the opposing muscle.
the tongue
One of the four extrinsic muscles of the tongue is the palatoglossus. The palatine aponeurosis, a fibrous layer at the back roof of the mouth known as the soft palate, is where this muscle gets its start. The palatoglossus muscle then descends from this point and joins with the tongue.