1 Know what a set and an element are. 2  Write a mathematical statement with an equal sign or an inequality.  Identify what numbers belong to the set of natural numbers, whole numbers, integers, rational numbers, irrational numbers, and real numbers.
Discogenic spondylosis, which is often thought of as a form of spinal osteoarthritis, refers to a degenerative condition that affects the joints of the spine.
Background. Lumbosacral spondylolysis (lumbar spondylolysis) is a unilateral or bilateral defect of the pars interarticularis that affects one or more of the lumbar vertebrae. See the images below.Radiograph of L4 defect in the pars interarticularis. Computed tomography scan demonstrating defects in the left and right pars interarticularis. The term spondylolysis is derived from the Greek words spondylos, meaning vertebra, and lysis, meaning break or defect.ee the images below. Radiograph of L4 defect in the pars interarticularis. Computed tomography scan demonstrating defects in the left and right pars interarticularis. The term spondylolysis is derived from the Greek words spondylos, meaning vertebra, and lysis, meaning break or defect.