A rigid spine with pelvis and femur ends. The cerebellum, brain stem, brachial plexus, nerve roots and sciatic nerves are all shown. The sacrum opens to show the path of the nerves. The muscles include quadratus lumborum, piriformus, psoas major, iliacus and the lumber section of erector spinae. The disc at L4/5 is herniated. Supplied with stand. Height 84 cm.