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

It is presumed that muscles and tendons are more susceptible to injury as they age, but it is not clear why injuries to soft tissues with an L5 and S1 nerve supply have such a strong correlation with ...

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.