Brain, spinal cord, spinal nerves and filaments, shown in situ. Skull, spine, and pelvic bones divided in sagital section. Brain, cerebellum, spinal cord and spinal nerves shown intact, filaments of dorsal and ventral roots of spinal nerves, lumbosacral plexus shown. Ribs (cut) intercostal muscles, pelvic floor, rectus abdominis muscles, anus also shown. Medial view.