<prompt> A person with intractable pain over the right leg is benefited byRight spinothalamic tract cordotomyLeft Spinothalamic tract cordotomyRight hemicordotomyLeft hemicordotomy  <response>: B Left Spinothalamic tract cordotomy Spinothalamic tract Touch sensation is transmitted by ventral spinothalamic tract Pain and temperature pain are transmitted by lateral spinothalamic tract Fibers of spinothalamic tract cross in the anterior commissure of the cord to the opposite Hence intractable pain over the right leg is benefited by left spinothalamic tract cordotomy. In anterolateral cordotomy, the spinothalamic tracts are carefully cut to relieve severe pain. 