Salpingopharyngeus

Origin, Insertion, Action & Nerve

Attachments explained

The Salpingopharyngeus is defined first by where it attaches. Its origin is the more fixed anchor, usually the proximal or more stable end that stays put during contraction, while its insertion is the more mobile point that is pulled toward the origin when the muscle shortens.

Action & function

When the Salpingopharyngeus contracts, it produces the following movement: Elevates the pharynx and opens the auditory tube during swallowing.

As part of the Pharynx group of the Head & Neck, it works alongside neighbouring muscles to generate smooth, coordinated movement and to stabilise the structures it acts on.

Nerve supply & clinical relevance

The Salpingopharyngeus receives its nerve supply from the Vagus nerve (CN X) via the pharyngeal plexus.

Because a muscle can only contract when its nerve is intact, injury to the Vagus nerve can weaken or paralyse the Salpingopharyngeus, impairing the movements it normally produces (elevates the pharynx and opens the auditory tube during swallowing). This is why knowing the innervation is central to localising nerve lesions in clinical practice.

How to study the Salpingopharyngeus (the OIANS method)

Decode the name, since salpinx means tube: this muscle runs from the auditory tube down into the pharynx, so it both elevates the pharynx and is associated with opening the tube. The salpingopharyngeal fold it raises is the visible landmark, and tying the name to the tube fixes both origin and function.

Group it with palatopharyngeus, into which it merges, and with stylopharyngeus as the longitudinal elevators of the pharynx. Salpingopharyngeus and palatopharyngeus share the vagus through the pharyngeal plexus, distinguishing them from stylopharyngeus on CN IX. Learning it in that trio consolidates its action and its nerve together.

Frequently asked questions

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