L5-S1 is the exact spot where the lumbar spine ends and the sacral spine begins. The lumbosacral joint connects these bones.
Most disc herniations occur at the bottom of the spine at the L4/5 and/or L5/S1 discs. The condition may not always cause ...
Thus, a left L5-S1 disc herniation compresses the left S1 ... Although most recover without surgery, patients with large midline lumbar HNPs may suffer significant neurological impairment.