The specialized anatomy of the upper cervical spine (UCS), comprised of the occipital-atlas (C0–C1) and atlas-axis (C1–C2) segments, produces complex three-dimensional movements and subsequently is ...
The occipital-atlas (C0–C1) and atlas-axis (C1–C2) segments join the head to the most mobile region of the spine. The lack of intervertebral discs, the horizontal nature of the joints, and the ...