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The basilar artery terminates by splitting into the left and right posterior cerebral arteries.
|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 the circle of Willis and joins with blood supplied to the anterior part of the circle of Willis from the internal carotid arteries.
Its branches can be divided into two groups:
- 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.
- Two or three paired long circumferential branches:
- the 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:
- the anterior inferior cerebellar artery (supplying the inferior and middle cerebellar peduncles of the cerebellum) and the adjacent hemisphere).
- the superior cerebellar artery.
A basilar artery stroke classically leads to Locked-in syndrome.
- 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