Spondylolisthesis occurs when a lumbar vertebra slips out of place. It slides forward, distorting the shape of your spine. This may compress the nerves in the spinal canal. The nerves that exit the foramen (open spaces on the sides of your vertebrae) may also be compressed. These compressed nerves can cause pain and other problems.

Symptoms:

• Low back pain
• Sciatica
• Pain that gets worse with activity
• Tight hamstrings
• Trouble standing or walking