Trigeminal artery

Trigeminal artery is an artery that is present during the fetal development of the human body. It is one of the primitive anastomoses between the carotid and vertebrobasilar system. The trigeminal artery usually regresses during the later stages of fetal development, but in some cases, it may persist in adults. This condition is known as a persistent trigeminal artery (PTA).

Anatomy

The trigeminal artery originates from the internal carotid artery and connects to the basilar artery. It is the largest of the embryonic carotid-vertebrobasilar anastomoses. The artery is named after the trigeminal nerve because it runs along the nerve in its course.

Clinical significance

A persistent trigeminal artery is rare, occurring in less than 0.2% of the population. It is often discovered incidentally during neuroimaging. The presence of a PTA can have clinical implications in vascular and endovascular procedures. It can also be associated with aneurysms, arteriovenous malformations, and other vascular anomalies.

See also

• Carotid artery
• Vertebral artery
• Basilar artery
• Trigeminal nerve

References

Trigeminal artery Resources
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