APPLIED RADIOLOGICAL ANATOMY

Detailed explanation-1: -The axis (C2) cervical vertebra is the second vertebra of the spine. It is unique in that it contains the odontoid process-odontoid means “tooth” and that is what this bone looks like-that forms a pivot point on which C1 atlas can rotate.

Detailed explanation-2: -Lateral Atlantoaxial Joints The superior articular processes allow one lateral mass to glide forward while another glides backward. This motion permits the C1 to rotate around the dens of the C2.

Detailed explanation-3: -The C1 and C2 vertebrae are the first two vertebrae at the top of the cervical spine. Together they form the atlantoaxial joint, which is a pivot joint. The C1 sits atop and rotates around C2 below. More of the head’s rotational range of motion comes from C1-C2 than any other cervical joint.

Detailed explanation-4: -The vertebra which provides a pivot for rotation of the first cervical vertebra (atlas) C1 is the second cervical vertebra (axis).

Detailed explanation-5: -C2, the axis, articulates superiorly with C1 by a unique bony structure called the dens or odontoid process. It projects up from the vertebral body and articulates with the atlas. The dens permit pivoting motion and allow a greater range of motion in rotating the head laterally.