Anterior choroidal artery

The anterior choroidal artery (AChA) supplies several crucial anatomical structures of the brain important for vision and motor control. Identification of AChA is important because of its strategic and extensive area of supply as well as large variations in the territorial distribution.

The AChA originates from the posterior wall of the ICA between the origin of posterior communicating artery (PCOM), which is 2-5 mm proximally and the internal carotid termination, which is 2-5 mm distal to the AChA. It measures ~1 mm in diameter.

The AChA is located lateral to the optic tract, it then curves medially to its inferomedial surface, to curve again laterally to run along the lateral aspect of the optic tract and circumvents the cerebral peduncles to reach the lateral geniculate body. It traverses in the posterolateral direction above the uncus to enter the choroidal fissure.

The AChA can be divided into two segments:

  • cisternal segment: extends from its origin until the choroidal fissure; measures ~2.5 cm (range 1.5-3.5 cm) in length
  • intraventricular segment: after entering the choroidal fissure
  • cisternal segment
  • intraventricular segment
    • choroid plexus of the anterior part of the temporal horns of the lateral ventricles
Neuroanatomy
Share article

Article information

rID: 28192
Section: Anatomy
Tags: pm, cases
Synonyms or Alternate Spellings:
  • AChA
  • Anterior choroidal artery (AChA)

Support Radiopaedia and see fewer ads

Cases and figures

  • Drag
    Figure 1: cerebral vascular territories
    Drag here to reorder.
  • Drag
    High Resolution T...
    Figure 2: MRA of the choroidal arteries
    Drag here to reorder.
  • Updating… Please wait.
    Loadinganimation

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.