Ventrolateral cordotomy for relief of pain in right lower limb is by cutting the:
Pain and temperature is carried by lateral spinothalamic tract. This tract cross obliquely to the opposite side within one spinal segment and ascend in the opposite anterolateral white column as the lateral spinothalamic tract. So, pain from right leg relieved by cutting left lateral spinothalamic tract.
Left ventral spinothalamic tract
Left lateral spinothalamic tract
Right ventral spinothalamic tract
Right lateral spinothalamic tract