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Salpingopharyngeus muscle

Muscle of the pharynx

Field	Value
Name	Salpingopharyngeus muscle
Latin	musculus salpingopharyngeus
Image	Salpingopharyngeus.png
Caption	Dissection of the muscles of the palate from behind.
Origin	Lower part of the cartilage of the auditory tube
Insertion	Fibers pass downward and blend with the palatopharyngeus muscle to the upper border thyroid cartilage, blending with constrictor fibers
Blood	Ascending pharyngeal artery
Nerve	Vagus nerve (CN X)
Action	Assists in elevating pharynx, pulls on torus tubarius to pressure equalize middle ear

The salpingopharyngeus muscle is a muscle of the pharynx. It arises from the lower part of the cartilage of the Eustachian tube,**** and inserts into the palatopharyngeus muscle by blending with its posterior fasciculus. It is innervated by vagus nerve (cranial nerve X) via the pharyngeal plexus. It raises the pharynx and larynx during deglutition (swallowing) and laterally draws the pharyngeal walls up. It opens the pharyngeal orifice of the Eustachian tube during swallowing to allow for the equalization of pressure between it and the pharynx.

Structure

The salpingopharyngeus is a very slender muscle. It passes inferior-ward from its origin to its insertion within the salpingopharyngeal fold.

Origin

The salpingopharyngeus muscle arises from the inferior portion of the cartilaginous part of the pharyngotympanic tube near its pharyngeal opening. Its origin creates the posterior welt of the torus tubarius.

Insertion

It ends distally by blending with the palatopharyngeus muscle.

Innervation

The salpingopharyngeus receives motor innervation from the pharyngeal plexus of the vagus nerve.

Blood supply

The salpingopharyngeus muscle receives arterial supply from the ascending palatine artery, greater palatine artery, and the pharyngeal branch of the ascending pharyngeal artery.

Variation

The salpingopharyngeus muscle is absent in about 40% of individuals. It is more common in thin individuals.

Function

The salpingopharyngeus muscle raises the pharynx and larynx during deglutition (swallowing) and laterally draws the pharyngeal walls up. Unusually, it is relaxed during deglutition, but contracts at all other times. It opens the pharyngeal orifice of the Eustachian tube during swallowing allowing for the equalization of pressure between it and the pharynx.

Additional images

|Image:Torus tubarius dissection.jpg|Torus tubarius dissection show salpingopharyngeus muscle |Image:Eustachian tube muscles dissection.jpg|salpingopharyngeus muscle dissection

References

Sinnatamby, Chummy. (2011). "Last's Anatomy". Elsevier Australia.
Standring, Susan. (2020). "Gray's Anatomy: The Anatomical Basis of Clinical Practice".
(1943). "Functional Anatomy of the Eustachian Tube". Archives of Otolaryngology–Head & Neck Surgery.
Standring, Susan. (2020). "Gray's Anatomy: The Anatomical Basis of Clinical Practice".
(2022). "Anatomy, Head and Neck, Pharynx". StatPearls Publishing.
(1980-11-01). "A reappraisal of the salpingo-pharyngeus muscle". Archives of Oto-Rhino-Laryngology.

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

muscles-of-the-head-and-neck pharynx

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