<prompt> Lateral medullary syndrome is caused by thrombosis of-Anterior inferior cerebral aeryPosterior interior cerebellar aeryVeebral aeryBasilar aery  <response>: Dorsolateral pa of the medulla is suplied by posterior inferior cerebellar aery ,which usually a branch of veebral aery thrombosis of posterior inferior cerebellar aery ,therfore effects a wedge shaped area on the dorsolateral aspects of medulla and the inferior surface of cerebellum produce lateral medullary syndrome of wallenberg. Ref Harrison20th edition pg 2435 