Anterior communicating artery

In human anatomy, the anterior communicating artery is a blood vessel of the brain that connects the left and right anterior cerebral arteries.

Anterior communicating artery
The cerebral arterial circle and arteries of the brain. The anterior communicating arteries (top of figure) connect the left and right anterior cerebral arteries.
LatinArteria communicans anterior
Anatomical terminology

The anterior communicating artery connects the two anterior cerebral arteries across the commencement of the longitudinal fissure. Sometimes this vessel is wanting, the two arteries joining together to form a single trunk, which afterward divides; or it may be wholly, or partially, divided into two. Its length averages about 4 mm, but varies greatly. It gives off some of the anteromedial ganglionic vessels, but these are principally derived from the anterior cerebral artery.

It is part of the cerebral arterial circle, also known as the circle of Willis.


Aneurysms of the anterior communicating artery are the most common circle of Willis aneurysm[1] and can cause visual field defects such as bitemporal heteronymous hemianopsia (due to compression of the optic chiasm),[2] psychopathology and frontal lobe pathology.[3]

The arteries of the base of the brain. Anterior communicating artery at top. The temporal pole of the cerebrum and a portion of the cerebellar hemisphere have been removed on the right side. Inferior aspect (viewed from below).


This article incorporates text in the public domain from page 572 of the 20th edition of Gray's Anatomy (1918)

  1. Beck J, Rohde S, Berkefeld J, Seifert V, Raabe A. Size and location of ruptured and unruptured intracranial aneurysms measured by 3-dimensional rotational angiography. Surg Neurol. 2006 Jan;65(1):18-25; discussion 25-7. PMID 16378842.
  2. Aoki N. Partially thrombosed aneurysm presenting as the sudden onset of bitemporal hemianopsia. Neurosurgery. 1988 Mar;22(3):564-6. PMID 3362325.
  3. Johnson MK, O'Connor M, Cantor J. Confabulation, memory deficits, and frontal dysfunction. Brain Cogn. 1997 Jul;34(2):189-206. PMID 9220085.

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