Atlas fractures, which occur in the first cervical vertebra (C1), are significant ... excessive movement between the atlas and the axis (C2). Lateral Mass Displacement (LMD): The displacement ...

Cervical spine involvement is a significant concern for patients with rheumatoid arthritis (RA), a chronic inflammatory disorder that primarily affects joints. The cervical spine can be ...

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 ...