Basilar artery

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"Basilar" redirects here. For basilar crackles or crepitations of the base of the lung, see crackles. For other uses, see Basal (disambiguation).
Artery: Basilar artery
Circle of Willis en.svg
The basilar artery (middle of figure) arises from the vertebral arteries and terminates when it bifurcates in the left and right posterior cerebral arteries.
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The arteries of the base of the brain. Basilar artery labeled below center. The temporal pole of the cerebrum and the cerebellar hemisphere have been removed on the right side. Inferior aspect (viewed from below).
Latin Arteria basilaris
Gray's p.580
Supplies Superior and inferior aspects of the cerebellum
Source Vertebral arteries
Branches Anterior inferior cerebellar, posterior cerebral, superior cerebellar arteries and pontine branches
MeSH Basilar+Artery

In human anatomy, the basilar artery is one of the arteries that supplies the brain with oxygen-rich blood.

The two vertebral arteries and the basilar artery are sometimes together called the vertebrobasilar system, which supplies blood to the posterior part of circle of Willis and anastomoses with blood supplied to the anterior part of the circle of Willis from the internal carotid arteries.


It arises from the confluence of the two vertebral arteries at the junction between the medulla oblongata and the pons.

It ascends in the central gutter (sulcus basilaris) inferior to the pons and divides into the posterior cerebral arteries and the superior cerebellar arteries just inferior to the pituitary stalk.

From the basilar artery arises the anterior inferior cerebellar artery (supplying the superior and inferior aspects of the cerebellum), as well as smaller branches for the supply of the pons (the pontine branches).

In under 15% of people the basilar artery gives rise to the labyrinthine artery.

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