1
.
| Posterior semicircular canal |
2
.
| Inferior petrosal sinus |
3
.
| Upper pointer: Glossopharyngeal nerve (IX) Lower pointer: Vagus nerve (X) |
4
.
| Superior jugular venous bulb (jugular foramen opened, vein emptied of latex, and its anterior wall dissected to show artery to superior ganglion of vagus nerve) |
5
.
| Roots of hypoglossal nerve (XII) (hypoglossal canal opened to reveal veins and fibrous tissue enclosing nerve) |
6
.
| Occipital bone (cut across) |
7
.
| Cervical prevertebral fascia (exposed by removal of lateral rectus capitis muscle) |
8
.
| Atlantooccipital joint cavity |
9
.
| Vertebral artery (cut across) |
10
.
| Upper pointer: Ventral branch cervical nerve I Lower pointer: Groove for vertebral artery of atlas |
11
.
| Inferior oblique capitis muscle (cut across) |
12
.
| Spinal ganglion cervical nerve II |
13
.
| Tendinous slip of longissimus cervicis muscle (cut across) |
14
.
| Arch of axis (cut across) |
15
.
| Joint capsule |
16
.
| Dorsal branch cervical nerve III |
17
.
| Levator scapulae muscle |
18
.
| Trigeminal nerve (V) |
19
.
| Vestibulocochlear nerve (VIII) |
20
.
| Clivus |
21
.
| Dura mater (cut edge) |
22
.
| Upper pointer: Posterior longitudinal ligament Lower pointer: Cruciform ligament of atlas (longitudinal fasciculi) |
23
.
| Alar ligament (cut across on left) |
24
.
| Position of dens (axis) |
25
.
| Cut edge of tectorial membrane |
26
.
| Transverse ligament of atlas (part of cruciform ligament) |
27
.
| Dura mater |