1
.
| Circular sinus |
2
.
| Tuberculum sellae |
3
.
| Oculomotor nerve (III) |
4
.
| Band of dura mater extending between anterior and posterior clinoid processes |
5
.
| Internal carotid artery |
6
.
| Optic foramen |
7
.
| Trochlear nerve (IV) |
8
.
| Ophthalmic nerve (V1) |
9
.
| Superior orbital fissure |
10
.
| Maxillary nerve (V2) entering foramen rotundum |
11
.
| Basilar venous plexus and posterior clinoid process |
12
.
| Posterior longitudinal ligament (cut off) |
13
.
| Ligamentous band of dura mater extending from tip of petrous part of temporal bone to sphenoid bone (petrodinoid ligament) |
14
.
| Abducens nerve (VI) |
15
.
| Major portion of trigeminal nerve (V) |
16
.
| Meckel's cave |
17
.
| Filament of cavernous nerve plexus |
18
.
| Semilunar ganglion (trigeminal) |
19
.
| Upper pointer: Thin lamina of bone which covers carotid canal Lower pointer: Major superficial petrous nerve |
20
.
| Mandibular nerve (V3) |
21
.
| Lesser superficial petrosal nerve |
22
.
| Middle meningeal artery (cut off) |