Collicular artery

Structure

The collicular artery originates from P1 segment of the posterior cerebral artery near the side of interpeduncular fossa. It arises just distal to the bifurcation of the basilar artery. It runs posteriorly along the cerebral peduncle passing the crural and ambient cisterns. It then gives off branches to supply quadrigeminal plate and the adjacent structures in the midbrain. The origin of this artery is proximal to the origin of medial and lateral posterior choroidal branch of the posterior cerebral artery. The main collicular artery also gives branch to an accessory collicular artery.

Branches

;Anterior branches Anteromedial branches are rare but sometimes observed to contribute as part of the interpeduncular fossa's lateral rami of the intermediate pedicle. Anterolateral branches are abundant branching from both main and accessory collicular arteries. They only exist on the lower part of cerebral crus.

;Lateral branches These lateral branches are found near lateral part of cerebral crus arising from both main and accessory collicular arteries.

;Posterior branches These branches originate from the terminal branch of the collicular artery.

Function

This small artery supplies the superior colliculus, inferior colliculus, and tectum of midbrain.

References

References

1. Tatu, Laurent. (1996-11-01). "Arterial territories of human brain Brainstem and cerebellum". Neurology.
2. Duvernoy, Henri M.. (2013). "Human Brain Stem Vessels: Including the Pineal Gland and Information on Brain Stem Infarction". Springer Science & Business Media.