Occipital artery

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Blood vessel

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The occipital artery is a branch of the external carotid artery that supplies blood to the back of the scalp, the sternocleidomastoid muscle, and the meninges. It is one of the several arteries that provide blood to the scalp and is important in the vascular network of the head and neck.

Anatomy

The occipital artery arises from the posterior aspect of the external carotid artery, opposite the origin of the facial artery. It travels posteriorly, passing deep to the posterior belly of the digastric muscle and the stylohyoid muscle. It then ascends to the posterior part of the scalp, running alongside the greater occipital nerve.

Branches

The occipital artery gives off several branches:

• The auricular branch supplies the auricle and the mastoid process.
• The meningeal branch supplies the dura mater of the posterior cranial fossa.
• The sternocleidomastoid branch supplies the sternocleidomastoid muscle.
• The descending branch contributes to the anastomosis with the vertebral artery and the deep cervical artery.

Function

The primary function of the occipital artery is to supply oxygenated blood to the posterior scalp, the sternocleidomastoid muscle, and the meninges. It plays a crucial role in maintaining the vascular supply to these regions, which is essential for their normal function and health.

Clinical significance

The occipital artery can be involved in various clinical conditions. For instance, it can be a source of bleeding in scalp lacerations due to its superficial location. It is also sometimes involved in temporal arteritis, an inflammatory condition affecting the arteries of the head.

In certain surgical procedures, such as craniotomies, the occipital artery must be carefully managed to prevent excessive bleeding. Additionally, the artery can be used as a landmark in various diagnostic and therapeutic procedures involving the head and neck.

See also

• External carotid artery
• Scalp
• Sternocleidomastoid muscle
• Meninges

References

Template:Arteries of the head and neck