Lumbar spine (lumbar vertebra), sacrum (os sacrum) and the hip (hip bone) in front view. Furthermore, spinal nerves and the lumbosacral plexus. Nerves from top to bottom: subcostal nerve, iliohypogastric nerve, ilioinguinal nerve, femoral nerve, lumbosacral trunk, genitofemoral nerve, obturator nerve and sacral plexus. Joint surfaces, symphysis and intervertebral discs in blue. The two bands are respectively the sacrospinous ligament.