The spinal cord actually ends at approximately the L1 level in most individuals. All of the nerves leaving the spine for lower segments (L5, S1) leave the spinal cord and travel the remainder of the way outside the cord. The collection of these nerves is referred to as the cauda equina (named after a horses tail). Cauda equina syndrome occurrs when something compresses these structures. It is possible with cauda equina syndrome to spare the nerves serving motor function in the leg , and only injure the nerves going to your bowel, bladder, and sensation in the perineal region. Since you had a fall with recurrence of symptoms, a MRI may be needed to ensure that there has been no new injury. You should discuss this with your surgeon, and if you are not satisfied then a second opinion with a spine surgeon, or a consult with a Neurologist would be appropriate. If you are in the Cleveland Clinic area we have excellent surgeons and neurologists available for consultations. If at any point you loss complete bladder or bowel function this is an emergency, which should be addressed immediately. I hope this helps. Goodluck
Georgie