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	lesser 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* [edit on Wikidata]

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.

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

Left temporal bone. Outer surface.
Hyoid bone. Anterior surface. Enlarged.
Superficial dissection of the right side of the neck, showing the carotid and subclavian arteries.
Extrinsic muscles of the tongue. Left side.
Stylohyoid muscle
Stylohyoid muscle

References

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

External links

510328910 at GPnotebook
Anatomy figure: 34:02-04 at Human Anatomy Online, SUNY Downstate Medical Center

Muscles of the neck

Cervical	Platysma Sternocleidomastoid Longus capitis Longus colli Scalene anterior middle posterior Rectus capitis anterior muscle Rectus capitis lateralis muscle

Suboccipital	Rectus capitis posterior major minor Obliquus capitis inferior superior

Suprahyoid	Mylohyoid Stylohyoid Digastric Geniohyoid

Infrahyoid	Thyrohyoid Sternohyoid Sternothyroid Omohyoid

Pharynx	Pharyngeal constrictor superior middle inferior Stylopharyngeus Salpingopharyngeus

Larynx	Cricothyroid Cricoarytenoid posterior lateral Arytenoid oblique arytenoid aryepiglottic transverse arytenoid Thyroarytenoid vocal thyroepiglottic

Trachea	Trachealis

Fasciae	Deep cervical fascia Pretracheal fascia Prevertebral fascia Investing layer Carotid sheath Alar fascia Palatine aponeurosis Buccopharyngeal fascia Pharyngobasilar fascia Pharyngeal raphe

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