What is spondylolyis?

Answer 1

Spondylolyis is a condition where there is an injury (stress fracture or fracture) in the pars interarticularis of the posterior elements of the spine. Spondylolisthesis describes the anterior displacement of a vertebra or the vertebral column in relation to the vertebrae inferior to it. The forward translation of the vertebral body causes narrowing of the central spinal canal at the level of the slip.