Posterior communicating aery is a branch of internal carotid aery. The other branches of basilar aery are: Superior cerebellar aery Posterior cerebral aeries . The branches of cerebral pa of internal carotid aery are: Ophthalmic aery Anterior cerebral aery Middle cerebral aery Posterior communicating aery Anterior choroidal aery . imageref - Vishram singh 2e pg 174