Posterior Communicating Artery Aneurysm | Cohen Collection | Volumes | The Neurosurgical Atlas

#throwback The posterior cerebral artery (PCA) has five segments: P1, pre-communicating segment, originates at the end of the basilar artery & terminates at the posterior communicating artery (green) P2, post-communicating segment, begins after the posterior communicating artery (PCOM) and loops around the midbrain & terminates at the origin of the lateral occipital artery as it enters the quadrigeminal cistern (blue) P3, quadrigeminal segment, which runs through the quadrigeminal cistern in a p