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Inferior belly of omohyoid

Other Terms: Venter inferior (Musculus omohyoideus), Venter superficialis musculus omohyoidei inferior

Muscle parts

Superior belly; Inferior belly

Latin name

Musculus omohyoideus

Latin muscle parts

Venter superior; Venter inferior

Group

Cervical wall – ventral muscle (Infrahyoid muscle)

Etymology

The English name for this muscle is the muscle of the shoulder and the hyoid bone. The term omo comes from the Greek word omos meaning “shoulder” and the term hyoid comes from its resemblance to the Greek letter upsilon (u), which is aspirated as hy. This is combined with the suffix eidos meaning “shape or form.”

Origin

Inferior belly arises from the superior border of the scapula at the scapular notch and the superior transverse scapular ligament

Insertion

Passes via an intermediate tendon to the superior belly, which inserts on the inferior border of the hyoid body laterally

Action

Depresses an elevated hyoid bone and assists in raising the cervical fascia during inspiration.

Nerve supply

Ventral ramus via ansa cervicalis (C1) (superior belly); ventral ramus via the ansa cervicalis (C2 and C3) (inferior belly)

Blood supply

Infrahyoid artery from the superior thyroid artery, suprahyoid branch of the lingual artery. Superficial cervical artery from the thyrocervical trunk of the subclavian artery. Inferior thyroid artery from the thyrocervical trunk of the subclavian artery

Latin

Venter superficialis musculus omohyoidei inferior

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