The lumbar spine includes the five vertebrae in your lower back numbered L1 to L5. These bones help provide ... is called the lumbosacral joint, or L5-S1. The muscles in your lumbar spine work ...

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., ...

It was most common at the L5/S1 level, and, of the abnormal group ... A more detailed follow up study should be considered to investigate which particular training activities have the most impact on ...

that points to the S1 dermatome as a likely site of injury. A pinched nerve, also called radiculopathy, results from narrowing of the space where the nerve roots pass between the vertebrae.