Corpus: Collicular artery
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Synonym: quadrigeminal artery
1. Definition
The collicular artery is a branch of the posterior cerebral artery that arises from the precommunicate segment (P1). It supplies parts of the midbrain and the tectum as well as the superior and inferior colliculi.
2. Anatomy
The collicular artery emerges from the posterior cerebral artery near the interpeduncular fossa immediately distal to the bifurcation of the basilar artery. The vessel runs posteriorly along the pedunculi cerebri and grazes the cisterna cruris and cisterna ambiens. It then gives off smaller branches to supply the lamina quadrigemina and its neighbouring structures.