1 Puget Sound Sports and Spine Physicians, Seattle ... Conclusions—Isthmic spondylolysis is considered to represent a fatigue fracture of the pars interarticularis of the neural arch. There is a ...

resulting from repetitive extension and rotation of the spine. This may result in damage to any of the posterior elements of the lumbar vertebrae, but the pars interarticularis is the most common ...

Sites of increased scintigraphic uptake in the posterior elements of the lumbar spine and complete or incomplete fracture in the pars interarticularis were compared for these two sports. Results: ...