Base of the skull, upper surface
Illustration of upper surface of the skull base.
| Term name | Layer | |
|---|---|---|
| 1 | Groove for middle meningeal artery | Layer 1 |
| 2 | Anterior cranial fossa | Layer 1 |
| 3 | Middle cranial fossa | Layer 1 |
| 4 | Posterior cranial fossa | Layer 1 |
| 5 | Groove for sigmoid sinus | Layer 1 |
| 6 | Superior border of petrous part | Layer 1 |
| 7 | Sphenoidal lingula | Layer 1 |
| 8 | Superior orbital fissure | Layer 1 |
| 9 | Lesser wing | Layer 1 |
| 10 | Internal occipital protuberance | Layer 1 |
| 11 | (Internal occipital crest) | Layer 1 |
| 12 | Hypophysial fossa | Layer 1 |
| 13 | Clivus | Layer 1 |
| 14 | Dorsum sellae | Layer 1 |
| 15 | Posterior clinoid process | Layer 1 |
| 16 | Anterior clinoid process | Layer 1 |
| 17 | Foramen lacerum | Layer 1 |
| 18 | Foramen magnum | Layer 1 |
| 19 | Hypoglossal canal | Layer 1 |
| 20 | Jugular foramen | Layer 1 |
| 21 | Internal acoustic opening | Layer 1 |
| 22 | Foramen spinosum | Layer 1 |
| 23 | Foramen ovale | Layer 1 |
| 24 | Foramen rotundum | Layer 1 |
| 25 | Optic canal | Layer 1 |
| 26 | Cribriform plate | Layer 1 |
| 27 | Crista galli | Layer 1 |
| 28 | Foramen caecum | Layer 1 |