The corda equina carries nerves which control the bladder and bowel. The cauda equina also carries nerves which control movement of the legs, and nerves which sense light touch and pain in the legs or around the back passage (perineum). Cauda equina syndrome (CES) is a particularly serious type of nerve root problem.There is pressure on the nerves at the very bottom of the spinal cord.he corda equina carries nerves which control the bladder and bowel. The cauda equina also carries nerves which control movement of the legs, and nerves which sense light touch and pain in the legs or around the back passage (perineum). Cauda equina syndrome (CES) is a particularly serious type of nerve root problem.