Basilar artery

Last edit by Alaric Steinmetz on

Synonyms: basilar artery

The basilar artery is an artery of the brain that arises from the union of the right and left vertebral artery.

Anatomy

The basilar artery arises at the junction between the Medulla oblongata and the pons through the union of the two vertebral arteries on the clivus of the skull base. It courses superiorly in the basilar sulcus of the pons. Along its course, the basilar artery gives off multiple perforators to the brainstem[^1].

Imaging

The basilar artery can be optimally visualized by digital subtraction angiography. The basilar artery can also be visualized on MRI and computed tomography.

Angiography of the basilar artery
The red arrow indicates the basilar artery on an angiogram.

Clinical relevance

aneurysms at the bifurcation of the basilar artery into the posterior cerebral artery are common and are referred to as basilar tip aneurysms.

Basilar tip aneurysm
A basilar tip aneurysm (red arrow) on cerebral angiography.

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