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Choroidal Arteries Overview

arteriae chorioideae

The choroidal arteries supply the choroid plexus and adjacent brain structures: the anterior choroidal artery (from the internal carotid or MCA) supplies the choroid plexus of the temporal horn, the optic tract, the lateral geniculate body, and the posterior limb of the internal capsule; the posterior lateral choroidal arteries (from the PCA) supply the choroid plexus of the third ventricle and the lateral ventricle atrium; the posterior medial choroidal artery (from the PCA P2) supplies the choroid plexus of the third ventricle and the tectum.

Region: Head & Skull

Clinical Relevance

Clinical Notes

Anterior choroidal artery occlusion produces the classic triad of contralateral hemiplegia (posterior limb internal capsule), hemisensory loss (thalamocortical radiation), and homonymous hemianopia (lateral geniculate or optic tract), though partial syndromes are more common. Its small calibre and long course make it particularly vulnerable to perforator infarction in hypertensive small vessel disease. It is at risk during ICA aneurysm clipping when the aneurysm dome abuts the artery's origin. Choroid plexus papilloma produces hydrocephalus from CSF overproduction in the choroidal territory.

Pathology

Common Injuries & Conditions

Anterior Choroidal Artery Occlusion Syndrome

Thromboembolism or surgical compromise of the anterior choroidal artery produces the anterior choroidal syndrome of contralateral hemiplegia, hemisensory loss, and homonymous hemianopia from infarction of the posterior internal capsule, lateral geniculate body, and optic tract within its territory.