This valuable teaching aid features a color-coded spinal curvature. Includes occipital bone and cerebellum, circle of Willis, vertebral artery, spinal nerves with sciatic nerve, right brachial plexus, first and second ribs, sacroiliac ligaments. Also includes several muscles: subocciptal triangle, longus capitis, scalene muscles, psoas major and minor, iliacus, gluteus medius and minimus, piriformis and gemellus. The following disorders are shown: bone spurs on L5; herniated disc between L4 & L5; and L1, L2 and L3 divide to show compression fractures, osteoporosis, bone tumor, and osteoarthritis of the hip. Stand included. 34" tall. Weighs 14 lbs.