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Sternocleidomastoid Branch of Superior Thyroid Artery (Left)
Cardiovascular System

Sternocleidomastoid Branch of Superior Thyroid Artery (Left)

Ramus sternocleidomastoideus arteriae thyreoideae superioris

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Origin

The sternocleidomastoid branch of the superior thyroid artery arises from the superior thyroid artery, the first branch of the external carotid artery. However, the sternocleidomastoid branch may arise directly from the external carotid artery.

Course

The sternocleidomastoid branch of the superior thyroid artery extends laterally, crossing the carotid sheath to reach the sternocleidomastoid muscle.

Branches

There are no named branches.

Supplied Structures

The sternocleidomastoid branch of the superior thyroid artery supplies the middle portion of the sternocleidomastoid muscle.

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Superior Thyroid Artery

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The superior thyroid artery is the first branch of the external carotid artery, near the bifurcation of the common carotid artery.

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