The spine is designed to both protect the spinal cord and allow movement. While strong and flexible, spinal structures can still develop stress-related injuries. Two commonly misunderstood spinal conditions are spondylolysis and spondylolisthesis.
- Spondylolysis is a stress fracture of a small section of the vertebra called the pars interarticularis.
- Spondylolisthesis occurs when this fracture causes the vertebra to slip forwards or backwards, creating instability.
These conditions most often affect the lower lumbar spine (L4–L5) and may range from mild to more severe depending on the degree of vertebral slippage.


