1
.
| Cerebellar tonsil |
2
.
| Medulla oblongata |
3
.
| Margin of foramen magnum |
4
.
| Vertebral artery and posterior inferior cerebellar artery |
5
.
| Suboccipital nerve |
6
.
| Posterior arch of atlas (cut across) |
7
.
| Dorsal root cervical nerve II |
8
.
| Inferior oblique capitis muscle |
9
.
| Greater occipital nerve |
10
.
| Third occipital nerve |
11
.
| Muscular branch of cervical nerve III |
12
.
| Splenius capitis muscle |
13
.
| Posterior median sulcus |
14
.
| Posterior intermedian sulcus |
15
.
| Posterior lateral sulcus |
16
.
| Dorsal root cervical nerve VI |
17
.
| Accessory filament of posterior root which bifurcates |
18
.
| Dura mater |
19
.
| Accessory nerve (Xl) (spinal root) |
20
.
| Posterior major rectus capitis muscle |
21
.
| Posterior atlanto-occipital membrane (cut across) |
22
.
| Posterior spinal artery |
23
.
| Semispinalis capitis muscle (cut across) |
24
.
| Denticulate ligament |
25
.
| Internal vertebral venous plexus and dura mater |
26
.
| Arch of cervical vertebra IV (cut across) |
27
.
| Posterior vertebral venous plexus |
28
.
| Multifidus muscle (cut across) |