L5-S1 is the exact spot where the lumbar spine ends and the sacral spine begins. The lumbosacral joint connects these bones.

Thus, a left L5-S1 disc herniation compresses the left S1 ... Although most recover without surgery, patients with large midline lumbar HNPs may suffer significant neurological impairment.

Lower back pain? You may have heard your practitioner mention something about your L4-L5 spinal segment. The lower back ...

Objectives: To observe the prevalence of lumbar intervertebral disc degeneration in elite athletes as compared with published literature of changes seen in non-athletes—that is, normal population.

An MRI scan revealed severe spinal canal stenosis at L3-L4 and L4-L5, as well as a herniated nucleus pulposus on the right at L5-S1 (Figs 11, 12). DC underwent a L3-L5 decompressive laminectomy ...