Posterior Communicating and Anterior Choroidal Arteries
Subspecialty: Neuro-anatomy
Type: Clinical Summary
The supratentorial segment of the internal carotid artery and its branches—particularly the posterior communicating artery (PComA) and the anterior choroidal artery (AChA)—have complex anatomic variants and numerous perforating branches that determine patterns of ischemia, cranial nerve relationships, and operative risk. This review details the anatomical configurations, branch distributions, segmental definitions, common variants (including fetal-type PComA and infundibular dilatations), and the surgical and angiographic implications clinicians must recognize to avoid devastating deficits. Ov…