1
.
| Posterior arch of atlas (pointers indicate upper and lower margins of arch) |
2
.
| Transverse process of atlas |
3
.
| Mandible |
4
.
| Body of axis (pointer indicates lower border of body) |
5
.
| Body of vertebra C. III (pointers indicate upper and lower borders) |
6
.
| Dens (axis) |
7
.
| Lateral mass of atlas (upper pointer, superior articular facet; lower pointer, inferior articular facet) |
8
.
| Transverse foramen of atlas |
9
.
| Lateral atlantoaxial joint |
10
.
| Upper pointer: Transverse foramen of axis Lower pointer: Transverse process of axis |
11
.
| Superior articular process vertebra C. III |
12
.
| Inferior articular process of axis |