Term Name:	posterior communicating artery
Synonyms:	arteria cerebri communicans posterior, caudal communicating segment, PCA, PCS, posterior communicating segment of the basilar artery
Definition:	One of a pair of right-sided and left-sided blood vessels in the circle of Willis. It connects the three cerebral arteries of the same side. Anteriorly, it is one portion of the terminal trifurcation of the internal carotid artery. The anterior cerebral artery and the middle cerebral artery are the other two branches of the trifurcation. Posteriorly, it communicates with the posterior cerebral artery.
Ontology:	Uberon Ontology [UBERON:0001628]