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

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., ...

The lumbar spine rests upon the sacrum. The place where they meet is called the lumbosacral joint, or L5-S1. The muscles in your lumbar spine work with your abdominal muscles to move your torso ...

Researchers assessed physiologic changes of the spine as well as the frequency of low back pain among astronauts during and after spaceflight.

In each simulated rowing position, axial scans were obtained at the level of the L4–5 and L5–S1 disc interspace to determine the cross sectional area of the posterior trunk muscles. Results: ...

Background: Beside symptoms and clinical signs radiological findings are crucial in the diagnosis of lumbar spinal stenosis (LSS). We investigate which quantitative radiological signs are ...

At the L5/S1 level, 58% were found to have an element of disc displacement ... the results suggest that elite athletes have a greater prevalence and greater degree of lumbar disc degeneration than the ...