Thyrohyoid muscle

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Thyrohyoid muscle
Muscles of the neck. Lateral view. (Thyrohyoideus labeled center-left.)
Muscles of the neck. Anterior view. (Thyrohyoideus visible center-left.)
Latin	musculus thyrohyoideus
Gray's	subject #112 394
Origin	thyroid cartilage of larynx
Insertion	hyoid bone
Artery
Nerve	first cervical nerve (C1-C2) via hypoglossal nerve
Actions	Elevates thyroid, depresses hyoid bone

The Thyrohyoid muscle is a small, quadrilateral muscle appearing like an upward continuation of the Sternothyreoideus. It belongs to the infrahyoid muscles group.

It arises from the oblique line on the lamina of the thyroid cartilage, and is inserted into the lower border of the greater cornu of the hyoid bone.

It originates at the oblique line of thyroid cartilage and inserts onto the inferior border of body and greater horn of hyoid. It is innervated by a branch of cervical nerve 1, which joins the hypoglossal nerve for a short distance, and depresses the hyoid and elevates the larynx.

[edit] Additional images

Hyoid bone. Anterior surface. Enlarged.	The veins of the thyroid gland.	Hypoglossal nerve, cervical plexus, and their branches.	The right brachial plexus with its short branches, viewed from in front.
Side view of the larynx, showing muscular attachments.

[edit] See also

• muscular triangle
• Thyrohyoid membrane

[edit] External links

• LUC thyh
• SUNY Labs 25:03-0106
• SUNY Labs 25:10-0105
• Thyrohyoid+muscle at eMedicine Dictionary
• Roche Lexicon - illustrated navigator, at Elsevier 25420.000-1
• PTCentral

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.

v • d • e List of muscles of head and neck: the neck (TA A04.2, GA 4.387) Cervical CN VII (superficial, PC): platysma CN XI (deep): sternocleidomastoid C1-C6 (anterior): Prevertebral muscles: longus (capitis, colli) C3-C8 (lateral): scalene (anterior, medius, posterior) Suboccipital C1: rectus capitis posterior (major, minor) · obliquus capitis (inferior, superior) C1-C6 (anterior): Prevertebral muscles: rectus capitis (anterior, lateralis) Suprahyoid CN V3 (medial): mylohyoid · anterior belly of digastric CN VII (lateral): stylohyoid · posterior belly of digastric C1 (deep): geniohyoid Infrahyoid/strap C1: thyrohyoid C1-C3: sternohyoid  · sternothyroid · omohyoid Fasciae Deep cervical fascia (Pretracheal fascia, Prevertebral fascia, Investing layer) · Carotid sheath · Alar fascia pharynx: Buccopharyngeal fascia · Pharyngobasilar fascia Palatine aponeurosis Pharyngeal raphe Pharynx pharyngeal constrictor (superior, middle, inferior) · longitudinal (stylopharyngeus, salpingopharyngeus) Larynx cricothyroid · cricoarytenoid (posterior, lateral) · arytenoid (oblique arytenoid/aryepiglottic, transverse arytenoid) · thyroarytenoid (vocal, thyroepiglottic)

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