<prompt> An anterolateral cordotomy relieving pain in right leg is effective because it interrupts theLeft dorsal columnLeft ventral spinothalmic tractLeft lateral spinothalmic tractRight lateral spinothalmic tract  <response>: Surgical procedure undeaken to relieve severe pain include cutting the nerve from the site of injury or ventrolateral cordotomy, in which the opposite side spinothalamic tracts are fully cut. Ref: Ganong;s review of medical physiology;23rd edition; pg:177 