Full-size model features the brain stem, occipital bone, atlas and axis through C7, with herniated disc, T1 and T3. This model has a soft cerebellum, full nerve with the right side brachial plexus. Muscles include sub-occipital triangle, longus capitis, levator scapulae, and scalenus medius posterior and anterior. The right first and second ribs are also featured and include cartilage. 5-1/2 in. x 6-1/2 in. x 10 in. model with 6-1/4 in. x 8-1/4 in. key card.