ALPHA
- Pterion formed of joining of parietal, frontal, sphenoid and temporal
- Trauma \(\rightarrow\) ruptured middle meningeal \(\rightarrow\) extradural
- Dural folds: falx cerebri, tentorium cerebelli, falx cerebelli
- Sinuses: superior and inferior sagittal sinus, straight sinus transverse sinus, sigmoid sinus, cavernous sinus
- Epidural space occupied by fat in spinal cord
| Foramen | Structure(s) |
|---|---|
| Superior orbital fissue | CN III, IV, \(V_1\), VI |
| F. rotundum | CN \(V_2\) |
| F. ovale | CN \(V_3\) |
| F. spinosum | middle mengingeal artery |
| F. lacerum | covered in cartiledge |
| Internal auditory meatus | CN VII, VIII |
| Stylomastoid foramen | CN VII exits skull after IAM |
| Jugular foramen | CN IX, X, XI |
| Hypoglossal canal | CN XII |