What is lumbosacral strain, with disc space narrowing at l4-5 at l4-5 with spondylolysis anterosuperiorly at l4 with lumbar intervertebral disc syndro?

Your question: got cut off, but a strain is a muscular injury, disc space narrowing is a manifestation of degenerative disc disease(analagous to arthritic change), and spondylolysis is a congenital or acquired defect in the lamina, part of the posterior aspect of the vertebra, which can potentially cause pain, instability, and accelerated degenerative arthritis.