Basilar artery

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Basilar artery
The basilar artery lies at the front of the brainstem in the midline and is formed from the union of the two vertebral arteries.
Diagram of the arterial circulation at the base of the brain (inferior view). The basilar artery terminates by splitting into the left and right posterior cerebral arteries.
SourceVertebral arteries
BranchesPontine arteries
anterior inferior cerebellar (AICA)
Paramedian arteries
superior cerebellar arteries
terminal posterior cerebral arteries.
SuppliesPons, and superior and inferior aspects of the cerebellum.
LatinArteria basilaris
Anatomical terminology

The basilar artery (U.K.: /ˈbæz.ɪ.lə/;[1][2] U.S.: /ˈbæs.ə.lər/[3]) is one of the arteries that supplies the brain with oxygen-rich blood.

The two vertebral arteries and the basilar artery are known as the vertebral basilar 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.[4][5][6]


The diameter of the basilar artery range from 1.5 to 6.6 mm.[7]


The basilar artery arises from the union of the two vertebral arteries at the junction between the medulla oblongata and the pons between the abducens nerves (CN VI).[8]


It ascends along the basilar sulcus of the ventral pons. It divides at the junction of the midbrain and pons into the posterior cerebral arteries.[citation needed]


Its branches from caudal to rostral include:[citation needed]

Clinical relevance[edit]

A basilar artery stroke classically leads to locked-in syndrome.[citation needed]

Additional images[edit]


  1. ^ "BASILAR | meaning in the Cambridge English Dictionary".
  2. ^ "basilar - Dictionary of English".
  3. ^ "Definition of basilar |". Retrieved 14 April 2023.
  4. ^ Jones, Jeremy. "Basilar artery | Radiology Reference Article |". Radiopaedia.
  5. ^ Purves, Dale (2012). Neuroscience (5th ed.). Sunderland, Mass. pp. 737–738. ISBN 9780878936953.{{cite book}}: CS1 maint: location missing publisher (link)
  6. ^ Carpenter, Malcolm B. (1985). Core text of neuroanatomy (3rd ed.). Baltimore: Williams & Wilkins. pp. 406–410. ISBN 0683014552.
  7. ^ Pico F, Labreuche J, Gourfinkel-An I, Amarenco P (September 2006). "Basilar artery diameter and 5-year mortality in patients with stroke". Stroke. 37 (9): 2342–7. doi:10.1161/01.STR.0000236058.57880.03. PMID 16888278. S2CID 5862145.
  8. ^ Byrne, James (2012). "Chapter 2. Cranial arterial anatomy". Tutorials in endovascular neurosurgery and interventional neuroradiology. Berlin: Springer. pp. 37–38. ISBN 9783642191541.

External links[edit]