spr interrupts selectively the lateral nociceptive and central myotactic afferent fibers curving toward lissauer 's tract and the anterior spinal cord , while sparing most of the medial lemniscal fibers curving toward the dorsal columns , as well as the fibers of the inhibitory circuitry of lissauer 's tract and dorsal horn .
C0037925
spinal cord
C0228576
dorsal columns