POSTERIOR COMMUNICATING aery is a branch of
Posterior communicating aery is a branch of cerebral pa of internal carotid aery. It arises close to its termination. It runs backwards and anastomoses with proximal pa of posterior cerebral aery.Reference: Textbook of anatomy, Head neck, and brain, Vishram Singh, 2nd edition, page no.406
Veebral aery
Internal carotid aery
External carotid aery
Basillary aery
Brain 