1
.
| Upper pointer: Vestibulocochlear nerve (VIII) Lower pointer: Inferior petrosal sinus |
2
.
| Glossopharyngeal nerve (IX) |
3
.
| Vagus. nerve (X) |
4
.
| Accessory nerve (XI) (spinal root) |
5
.
| Transverse sinus (sigmoid portion) |
6
.
| Vertebral artery |
7
.
| Posterior vertebral venous plexus |
8
.
| Superior oblique capitis muscle (cut across) |
9
.
| Muscular branch occipital artery |
10
.
| Inferior oblique capitis muscle (cut across) |
11
.
| Greater occipital nerve |
12
.
| Arch of axis (cut across) |
13
.
| Semispinalis capitis muscle |
14
.
| Dura mater (over clivus) |
15
.
| Roots of hypoglossal nerve (XII) |
16
.
| Upper pointer: Posterior longitudinal ligament Lower pointer: Position of dens (axis) |
17
.
| Margin of foramen magnum (cut across) |
18
.
| Vertebral artery and ventral roots of cervical nerve I |
19
.
| Posterior branch cervical nerve I |
20
.
| Posterior arch of atlas (cut across) |
21
.
| Posterior vertebral venous plexus |
22
.
| Longitudinal vertebral sinus |
23
.
| Dura mater |
24
.
| Upper pointer: Roots cervical nerve II Lower pointer: Roots cervical nerve III |
25
.
| Arch of cervical vertebra III (cut across) |