Sternohyoid muscle

From Wikipedia, the free encyclopedia

Sternohyoid muscle
Muscles of neck. Sternohyoideus labeled at middle, just to the right of thyroid cartilage.
Muscles of the neck. Lateral view. Sternohyoid muscle labeled
Latin	musculus sternohyoideus
Gray's	subject #112 393
Origin	manubrium of sternum
Insertion	hyoid bone
Artery:
Nerve:	ansa cervicalis
Action:	depresses hyoid
Dorlands /Elsevier	m_22/12550951

The sternohyoid muscle is a thin, narrow muscle attaching the hyoid bone to the sternum, one of the paired strap muscles of the infrahyoid muscles serving to depress the hyoid bone. It is innervated by the ansa cervicalis.

The muscle arises from the posterior border of the medial end of the clavicle, the posterior sternoclavicular ligament, and the upper and posterior part of the manubrium sterni.

Passing upward and medially, it is inserted by short tendinous fibers into the lower border of the body of the hyoid bone.

[edit] Variations

Doubling; accessory slips (Cleidohyoideus); absence.

It sometimes presents, immediately above its origin, a transverse tendinous inscription.

[edit] Additional images

Posterior surface of sternum.	Left clavicle. Inferior surface.	Hyoid bone. Anterior surface. Enlarged.	Section of the neck at about the level of the sixth cervical vertebra.
Posterior surface of sternum and costal cartilages, showing Transversus thoracis.	The fascia and middle thyroid veins. The veins here designated the inferior thyroid are called by Kocher the thyroidea ima.

[edit] External links

• LUC steh
• SUNY Labs 25:10-0103 - "Nerves and Vessels of the Carotid triangle"
• sternohyoid+muscle at eMedicine Dictionary
• 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 As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

v • d • e List of muscles of head and neck: the neck Cervical CN VII (superficial): platysma CN XI (deep): sternocleidomastoid 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 Vertebral C1-C6 (anterior): rectus capitis (anterior, lateralis) - longus (capitis, colli) C3-C8 (lateral): scalene (anterior, medius, posterior)