Acute PCA territory infarct

Right occipital lobe and thalamic involvement.

Right posteromedial temporal lobe infarct.

Absent flow in right PCA (P2) (Black arrow) in TOF MRA MIP images. White arrow pointing to left PCA P2 segment.

The major PCA segments are the Pre-communicating / Peduncular / P1 segment, Ambient / P2 segment and the Quadrigeminal / P3 segment.

The major branches from P1 segment include Posterior thalamo-perforating arteries and the median posterior choroidal artery.

Major branches from P2 segment of PCA includes lateral posterior choroidal artery and posterior choroidal artery.

Inferior temporal arteries, parieto-occipital artery, calcarine artery, posterior pericallosal (splenial) arteries are the major branches of the P3 or quadrigeminal segment of PCA.



Reference : Diagnostic Neuroradiology, Anne.G.Osborn, 1994.