2. Frontal bone
3. Ethmoid bone (cribiform plate)
4. Anterior clinoid process
5. Optic foramen
6. Sella turcica
7. Posterior clinoid process
8. Superior orbital fissure
9. Foramen rotundum
10. Foramen ovale
11. Internal acoustic meatus
12. Jugular notch
13. Formen sppinosum
14. Hypoglossal canal
15. Foramen magnum
16. Occipital bone
17. Sphenoid bone