Herniated nucleus pulposus (HNP), also referred to as a herniated disc, is a common spine pathology that occurs approximately 95% of the time at the L4-L5 or L5-S1 level (Fisher et al., 2004; Asch ...

Results The prevalence of disc herniation was ... of 6.28 (95% CI 1.06–37.21) for L4, 1.74 (95% CI 1.04–2.93) for L5, and 1.29 (95% CI 0.97–1.72) for S1 nerve root impingement.

This curve helps keep the discs and muscles in proper alignment. The lumbar spine rests upon the sacrum. The place where they meet is called the lumbosacral joint, or L5-S1. The muscles in your ...

Objectives: To observe the prevalence of lumbar intervertebral disc ... Results: The disc signal intensity was progressively reduced the more caudal the disc space. It was most common at the L5/S1 ...

Lumbar (lower back) fusions are not common to return from for a variety of reasons. There is a good chance that surgery doesn't help and the pain doesn't improve. In the general population, it's about ...