[TA] origin, internal carotid or (rarely) middle cerebral artery; distribution, named branches [TA] to choroid plexus of lateral and third ventricles, optic chiasm and tract, internal capsule (genu, posterior limb, and retrolentiform limb), lateral geniculate body, globus pallidus, tail of caudate nucleus, hippocampus, amygdaloid body, tuber cinereuum, hypothalamic nuclei, thalamic nuclei, substantia nigra, red nucleus, and crus cerebri. SYN: arteria choroidea anterior [TA].