Disc herniation at L5-S1 is also possible and is a common cause of sciatica—a problem with the sciatic nerve that can cause .

The lumbosacral plexus is formed by the ventral branches of the second to fifth lumbar nerves. The lower division of the fourth lumbar nerve joins ... and lower limbs. Compression of the plexus ...

The cauda equina is the lumbar and sacral nerve roots extending from the lowest part of the spinal cord. It fills the thecal sac from approximately L2 to S1. Symptoms include urinary retention or ...