Stylopharyngeus muscle

Stylopharyngeus muscle

Muscles of the pharynx and cheek. (Stylopharyngeus visible at center left.)
Details
Precursor 3rd Pharyngeal arch
Origin Styloid process (temporal)
Insertion thyroid cartilage (larynx)
Nerve glossopharyngeal nerve (CN IX)
Actions elevate the larynx, elevate the pharynx, swallowing
Identifiers
Latin musculus stylopharyngeus
MeSH A02.633.567.800
TA A05.3.01.114
FMA 46664

Anatomical terms of muscle

The stylopharyngeus is a muscle in the head that stretches between the temporal styloid process and the pharynx.

Structure

The stylopharyngeus is a long, slender muscle, cylindrical above, flattened below. It arises from the medial side of the base of the temporal styloid process, passes downward along the side of the pharynx between the superior pharyngeal constrictor and the middle pharyngeal constrictor, and spreads out beneath the mucous membrane.

Some of its fibers are lost in the constrictor muscles while others, joining the palatopharyngeus muscle, are inserted into the posterior border of the thyroid cartilage.

The glossopharyngeal nerve runs on the lateral side of this muscle, and crosses over it to reach the tongue.

Innervation

Stylopharyngeus is the only muscle in the pharynx innervated by the glossopharyngeal nerve (CN IX) and is done by its single motor branch, which supplies special visceral efferent (SVE) fibers to it.

Development

Embryological origin is the third pharyngeal arch

Function

The stylopharyngeus:

See also

This article uses anatomical terminology; for an overview, see Anatomical terminology.

Additional images

References

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

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