Corpus: Collicular artery

The collicular artery is a branch of the posterior cerebral artery that arises from the precommunicating segment (P1). It supplies parts of the midbrain, including the tectum, and the superior and inferior colliculi.

The collicular artery originates from the posterior cerebral artery near the interpeduncular fossa, just distal to the bifurcation of the basilar artery. It runs posteriorly along the cerebral peduncles, passing through the cisterna cruris and cisterna ambiens. The artery then gives off smaller branches to supply the lamina quadrigemina and surrounding structures.