| 1
.
| Crista gall & lamina cribrosa ethmoid bone |
| 2
.
| Orbital part of frontal bone & sphenofrontal suture |
| 3
.
| Lesser wing sphenoid bone |
| 4
.
| Greater wing sphenoid bone |
| 5
.
| Sphenosquamous suture |
| 6
.
| Temporal bone (squamous part) |
| 7
.
| Carotid canal & foramen lacerum |
| 8
.
| Petrosquamous fissure |
| 9
.
| Petrosal part of temporal bone |
| 10
.
| Squamous suture |
| 11
.
| Occipitomastoid suture |
| 12
.
| Mastoid part of temporal bone |
| 13
.
| Occipital bone (squamous part) |
| 14
.
| Parietal bone |
| 15
.
| Lambdoidal suture |
| 16
.
| Foramen magnum |
| 17
.
| Internal occipital crest (cruciate eminence) |
| 18
.
| Anterior cranial fossa |
| 19
.
| Optic foramen & anterior clinoid process |
| 20
.
| Sella turcica & posterior clinoid process |
| 21
.
| Foramen ovale |
| 22
.
| Foramen spinosum |
| 23
.
| Middle cranial fossa |
| 24
.
| Clivus |
| 25
.
| Condyloid canal |
| 26
.
| Posterior cranial fossa |
| 27
.
| Intersutural bone |
