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|Branches||Pontine perforating branches, anterior inferior cerebellar (AICA) and superior cerebellar arteries, and terminal posterior cerebral arteries.|
|Supplies||Pons, and superior and inferior aspects of the cerebellum.|
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 ascends superiorly in the central gutter (sulcus basilaris) ventral to the pons and divides at the ponto-mesencephalic junction into the paired posterior cerebral arteries close to the pituitary stalk.
Its branches can be divided into two groups:
A. Paramedian perforating arteries arising either directly from the dorsal surface or from short circumferential arteries running around and into the pons supplying the corticospinal tracts and vital deep nuclei.
B. Two or three paired long circumferential branches:
-internal auditory or labyrinthine artery, which may arise directly from the basilar artery in about 15% of people, but more commonly as a branch from the:
- Byrne, James (2012). "Chapter 2. Cranial arterial anatomy". Tutorials in endovascular neurosurgery and interventional neuroradiology. Berlin: Springer. pp. 37–38.
|Wikimedia Commons has media related to Basilar artery.|
- Basilar Artery at neuroangio.org
- Diagram at merck.com
- Anatomy photo:28:09-0204 at the SUNY Downstate Medical Center - "Cranial Fossae: Arteries, Inferior Surface of the Brain"
- Blood supply at neuropat.dote.hu
- Anatomy diagram: 13048.000-1 at Roche Lexicon - illustrated navigator, Elsevier
- Anatomy diagram: 13048.000-3 at Roche Lexicon - illustrated navigator, Elsevier
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