Spondylolysis and Spondylolisthesis
When back pain severely interferes with normal life, the cause may be either spondylolysis or spondylolisthesis. Although they may sound similar, one is actually a more advanced version of the other. These conditions are caused by the spinal bones (vertebrae) moving out of their proper alignment, often resulting from a fracture.
Spondylolysis is defined as a stress fracture in the bones of the spinal column while spondylolisthesis is a stress fracture that weakens bones so they are unable to maintain their proper position, resulting in shifting. They usually occur in the bones of the lower back, usually the last vertebra of the lumbar spine.
About five to six percent of the population is affected by these two conditions.
9 October, 2011