Atlantoaxial rotatory fixation (AARF) and subluxation are conditions that affect the cervical spine, specifically the joint between the first cervical vertebra (C1, or atlas) and the second ...

While there are many synovial joints in the cervical spine, RA tends to attack the one between the atlas and the axis, the first and second bones of the spine. The atlas is responsible for ...

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 ...