Salpingopharyngeus muscle

Salpingopharyngeus muscle
Dissection of the muscles of the palate from behind.
Details
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
Artery	Ascending pharyngeal artery
Nerve	Vagus nerve (CN X)
Actions	Assists in elevating pharynx, pulls on torus tubarius to pressure equalize middle ear
Identifiers
Latin	musculus salpingopharyngeus
TA98	A05.3.01.115
TA2	2191
FMA	46665
Anatomical terms of muscle [edit on Wikidata]

The salpingopharyngeus muscle is a muscle of the pharynx. It arises from the lower part of the cartilage of the Eustachian tube,[1] 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.[1] It passes inferior-ward from its origin to its insertion[1][2] within the salpingopharyngeal fold.[3]

Origin

The salpingopharyngeus muscle arises from the inferior portion of the cartilaginous part of the pharyngotympanic tube near its pharyngeal opening.[2] Its origin creates the posterior welt of the torus tubarius.[4]

Insertion

It ends distally by blending with the palatopharyngeus muscle.[2]

Innervation

The salpingopharyngeus receives motor innervation from the pharyngeal plexus of the vagus nerve.[2]

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.[2]

Variation

The salpingopharyngeus muscle is absent in about 40% of individuals. It is more common in thin individuals.[5]

Function

The salpingopharyngeus muscle raises the pharynx and larynx during deglutition (swallowing) and laterally draws the pharyngeal walls up.[6] Unusually, it is relaxed during deglutition, but contracts at all other times.[6] It opens the pharyngeal orifice of the Eustachian tube during swallowing allowing for the equalization of pressure between the it and the pharynx.^[citation needed]

See also

• Salpinx

Additional images

• 
  Torus tubarius dissection show salpingopharyngeus muscle
• 
  salpingopharyngeus muscle dissection

References

This article incorporates text in the public domain from page 1143 of the 20th edition of Gray's Anatomy (1918)

1. Sinnatamby, Chummy (2011). Last's Anatomy (12th ed.). Elsevier Australia. p. 385. ISBN 978-0-7295-3752-0.
2. Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42nd ed.). New York. p. 711. ISBN 978-0-7020-7707-4. OCLC 1201341621.
3. Standring, Susan (2020). Gray's Anatomy: The Anatomical Basis of Clinical Practice (42nd ed.). New York. p. 711. ISBN 978-0-7020-7707-4. OCLC 1201341621.
4. Simkins, Cleveland S. (1943). "Functional Anatomy of the Eustachian Tube". Archives of Otolaryngology–Head & Neck Surgery. 38 (5): 476–84. doi:10.1001/archotol.1943.00670040495009.
5. Albahout, Khaled S.; Lopez, Richard A. (2022), "Anatomy, Head and Neck, Pharynx", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID 31334991, retrieved 2023-01-12
6. Guindi, G. M.; Charia, K. K. C. (1980-11-01). "A reappraisal of the salpingo-pharyngeus muscle". Archives of Oto-Rhino-Laryngology. 229 (2): 135–141. doi:10.1007/BF00454236. ISSN 1434-4726. PMID 7458769. S2CID 3126653.

External links

• Illustration at princetonchiropractic.com