Stylohyoid muscle

Stylohyoid

The stylohyoid among the triangles of the neck.

Muscles of the neck. Anterior view. Stylohyoid muscle in purple
Details
Origin styloid process (temporal)
Insertion Greater cornu of hyoid bone
Nerve facial nerve (CN VII)
Actions Elevate the hyoid during swallowing
Identifiers
Latin musculus stylohyoideus
Dorlands
/Elsevier		 m_22/12550977
TA A04.2.03.005
FMA 9625

Anatomical terms of muscle

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.

Structure

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.

Additional images

See also

References

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

Anatomy figure: 34:02-04 at Human Anatomy Online, SUNY Downstate Medical Center


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.