|Muscles of the pharynx and cheek. (Stylopharyngeus visible at center left.)|
|Gray's||subject #244 1143|
|Origin:||Styloid process (temporal)|
|Insertion:||thyroid cartilage (pharynx)|
|Action:||elevate the larynx, elevate the pharynx, swallowing|
The stylopharyngeus is a long, slender muscle, cylindrical above, flattened below. It arises from the medial side of the base of the 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.
The glossopharyngeal nerve runs on the lateral side of this muscle, and crosses over it to reach the tongue.
This is the only muscle in the pharynx innervated by the glossopharyngeal nerve (CN IX) and is done by its motor branch which supplies special viceral efferent fibers to it.
- elevates the larynx
- elevates the pharynx
- dilates the pharynx to permit the passage of a large food bolus, so facilitating swallowing
Third Pharyngeal Arch
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