1. anterior arch of C1
2. posterior arch of C1
3. dens
4. body of C2
5. occipital condyle
6. spinous process of C2
7. lateral mass of C4
8. inferior facet of C4
9. superior facet of C7
10. pedicle of C7
11. facet joint
12. intervertebral disc
13. intervertebral foramen
