Everything about Palatoglossus Muscle totally explained
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's 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.
Action
Elevates posterior tongue, closes the
oropharyngeal isthmus, and aids initiation of swallowing.
Innervation
The palatoglossus is the only muscle of the tongue that's
not innervated by the
hypoglossal nerve (CN XII).
Some sources state that the palatoglossus is innervated by the
accessory nerve (CN XI) that's hitchhiking on the
vagus nerve (CN X) via the
pharyngeal plexus.
Other sources state that the palatoglossus isn't innervated by XI hitch-hicking on X, but rather it's innervated by X via the pharyngeal plexus formed from IX and X.
Further Information
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