Nerve facial nerve (CN VII) Dorlands
/Elsevier m_22/12550977 | Latin musculus stylohyoideus | |
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Origin styloid process (temporal) Insertion Greater cornu of hyoid bone Actions Elevate the hyoid during swallowing | ||
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.
Contents
Origin and insertion
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.
Innervation
A branch from the extracranial path of the facial nerve (CN VII) innervates the Stylohyoid muscle.
Variations
It may be absent or doubled, lie beneath the carotid artery, or be inserted into the omohyoid, or mylohyoid muscles.