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

This study reviews the results of 94 computed tomography (CT)-guided Craig needle biopsies of the spine and sacrum performed at one center. An indication for biopsy in this study was prompted by ...

Should the health issue affect the sacral and lumbar segments of the spine, it often results in numbness in the feet.