Circumflex Artery of the Sternocleidomastoid Muscle (A. Circumflexa Musculi Sternocleidomastoidei)

The circumflex artery of the sternocleidomastoid muscle (a. circumflexa musculi sternocleidomastoidei) is a small artery that arises from the external carotid artery and bends around the sternocleidomastoid muscle.

It branches from the external carotid artery at the level of the middle of the sternocleidomastoid muscle and is directed posteriorly, bending around this muscle. In this case, the artery gives off numerous muscular branches that supply blood to the sternocleidomastoid muscle.

Thus, the circumflex artery of the sternocleidomastoid muscle provides blood supply to this important neck muscle involved in head movements.

**Sternoclavicular circumflex artery** or **a. Circumflex muscle sternocleidomastoidei** (Latin, English: **artery circumflex muscle sternocleidomascloid**) is one of the blood vessels of the neck. It is a branch of the common carotid artery located on the outer surface of the sternocranial muscle.

The pectoral clavicular muscle (musculus sternocleidioclaviculis) is one of four muscles lying on the upper part of the sternum and collarbone. It connects them together, providing a connection between the skull and sternum.

The circumflex pectoral clavicular artery is the branch of the common carotid arterachia, which encircles the pectoral clavicular muscle at the level of its clavicular part.

It is located deep inside the body of the sternoglycalis muscle, and not on its surface, like some other branches of the common carotid and external pericardial arterial