The posterior cerebral artery (PCA) is one of a pair of cerebral arteries that supply oxygenated blood to the occipital lobe, as well as the medial and inferior aspects of the temporal lobe of the human brain.

The cortical branches are: The prenatal development of the posterior cerebral arteries in the fetus comes relatively late and arises from the fusion of several embryonic vessels near the caudal ends of the posterior communicating arteries supplying the mesencephalon and diencephalon.

In most adults, the PCA sources from the anterior portion of the basilar artery.

About 19% of adults retain PCommA dominance of the PCA, with 72% having dominant basilar origin, and the rest having either equal prominence between PCommA and basilar artery, or a single exclusive source.

[3] Signs and symptoms: Structures involved ocular group: central retinal