| Anterior choroidal artery | |
|---|---|
 Diagram of the arterial circulation at the base of the brain (inferior view). The anterior choroidal artery is labeled at right of thecircle of Willis. | |
| Details | |
| Source | Internal carotid artery |
| Identifiers | |
| Latin | arteria choroidea anterior |
| TA98 | A12.2.06.019 |
| TA2 | 4501 |
| FMA | 50087 |
| Anatomical terminology | |
Theanterior choroidal artery is abilaterally paired artery of the brain. It is typically a branch of theinternal carotid artery which supplies thechoroid plexus oflateral ventricle andthird ventricle as well as numerous structures of the brain.
Occlusion of the artery can result in loss of sensation, loss of part of thevisual field, and impaired movement, all on the opposite side of the body as the occlusion.
The anterior choroidal artery typically originates from theinternal carotid artery. It may (rarely) instead arise from themiddle cerebral artery.[1]
It originates from the distalinternal carotid artery (ICA) 5 mm distal to the origin of theposterior communicating artery and just proximal to the terminal bifurcation of the ICA.[2]
It initially course posterolaterally on the inferior surface of the cerebral hemisphere alongside the optic tract, crossing the tract medial-to-lateral[3] inferior to the tract.[4] At the level of thelateral geniculate nucleus, it curves around the lateral aspect of thecerebral peduncle to reach its posterior aspect. It reaches the medial portion of thetransverse cerebral fissure to enter the lateral ventricle.[3] It enters the lateral ventricle at the apex of itsinferior horn, at the inferior extremity of choroid fissure, just superior to theuncus.[4]
It serves structures in the prosencephalon, diencephalon, and mesencephalon:[2]
Occlusion of the artery results incontralateralhemianopsia (partial loss of vision) and hemianaesthesia (loss of sensation), as well as partialhemiplegia (loss of the ability to move).[4] These symptoms are thought to arise fromischemic damage to the posterior limb of theinternal capsule,thalamus, andoptic chiasm/optic tract. However, the posterior limb of the internal capsule also receives lenticulostriate arteries from themiddle cerebral artery, thus creating partially redundant supply.[5]
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