The other is the area just above, called L4-L5. In the low back, the L5-S1 junction is often the site ... Those who do may ...

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., ...

but it is not clear why injuries to soft tissues with an L5 and S1 nerve supply have such a strong correlation with advancing age, whereas there is little or no correlation between age and the soft ...