Anterior Cerebral Artery

Multiple Choice Questions in Neurology:

Anterior communicating artery (ACom) originates from which part of the anterior cerebral artery (ACA)?
  1. A3 - segment
  2. A1 - segment
  3. A2 - segment
  4. A4 - segment

Anterior Cerebral Artery


Anterior Communicating Artery (ACom)

  • It is about 4 mm in length.
  • The anterior communicating artery is an anastomosis between the left & right anterior cerebral artery circulation.
  • It originates from the anterior cerebral artery - A1 segment.
Applied Anatomy
  • Anterior communicating artery (ACom) is the most common site for intracranial aneurysm.
  • Anterior communicating artery (ACom) aneurysm may cause bitemporal heteronymous hemianopia.

Anterior Cerebral Artery

  • Anterior cerebral artery arises from the internal carotid artery.
  • It is divided into five segments.
A1: Pre-communicating segment
  • Medial lenticulostriate arteries
  • Anterior communicating artery
A2: Post-communicating segment
  • Recurrent artery of Heubner
  • Orbitofrontal artery
  • Frontopolar artery
A3: Pre-callosal segment
  • Pericallosal artery
  • Callosomarginal artery
A4: Supracallosal segment
A5: ​Post-callosal segment


  • Deluca, John, and Bruce J. Diamond. “Aneurysm of the Anterior Communicating Artery: A Review of Neuroanatomical and Neuropsychological Sequelae.” Journal of Clinical and Experimental Neuropsychology, vol. 17, no. 1, 1995, pp. 100–21, doi:10.1080/13803399508406586.

[Answer is 2. A1 - segment]

Multiple Choice Questions in Neurology:

Recurrent artery of Heubner originates from which part of the anterior cerebral artery (ACA)?
A1 - segment
A2 - segment
A3 - segment
A4 - segment

Kindly let me know your answer and review by comments below:


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