The stylohyoid muscle is a slender muscle, lying anterior and superior of the posterior belly of the digastric muscle. It shares this muscle's innervation by the facial nerve, and functions to draw the hyoid bone backwards and elevate the tongue. Its origin is the styloid process of the temporal bone. It inserts on the body of the hyoid .
The stylohyoid among the triangles of the neck.
Muscles of the neck. Anterior view. Stylohyoid muscle in purple
|Origin||styloid process (temporal)|
|Insertion||Greater cornu of hyoid bone|
|Nerve||facial nerve (CN VII)|
|Actions||Elevate the hyoid during swallowing|
|Anatomical terms of muscle|
It arises from the posterior and lateral surface of the styloid process of the temporal bone, near the base; and, passing inferior and anterior, it is inserted into the body of the hyoid bone, at its junction with the greater cornu, and just superior the omohyoid muscle. It thus belongs to the group of suprahyoid muscles.
When contracted, it elevates the hyoid, this action is primarily brought about during swallowing.
It is perforated, near its insertion, by the intermediate tendon of the digastric muscle.
A branch of the facial nerve (CN VII) innervates the stylohyoid muscle.
The stylohyoid muscle elevates and retracts hyoid bone. It initiates a swallowing action by pulling the hyoid bone in a posterior and superior direction.
Anatomy figure: 34:02-04 at Human Anatomy Online, SUNY Downstate Medical Center