Spondylolisthesis is an abnormal shift of the vertebrae in relation to each other - the higher vertebrae slides forward or backward relative to the lower vertebrae. Spondylolisthesis is associated with the instability of the spine - the greater the slide of the vertebrae, the greater the degree of instability. Spondylolisthesis most often occurs in the lumbar and lumbosacral spine, usually at the L5 / S1 level. Minor spondylolisthesis do not always cause pain. More dislocation of the vertebrae may result in pain, deterioration of efficiency and the appearance of neurological symptoms.

