The upper cervical spine, specifically, is the top vertebrae of the spine. It is made up of the atlas (C1) and the axis (C2). These vertebrae are atypical and are different in shape and function ...

The fossilized cervical vertebra and overlaying osteoderms of the new archosaur species Mambachiton fiandohana shown in a photograph (top), line drawing (middle), and computed tomography (CT ...