Atlanto-axial Joint of C1 & C2

The atlanto-axial joint is composed of C1 (Atlas) and C2 (Axis).  The dens/odontoid process of C2 articulate with the facet located in the anterior arch of C1.  It is a pivot joint and primary movement is rotation.

Superior view of the atlantoaxial joint, the odontoid process of C2 can be seen.  (Picture taken with a RX1)
Superior-lateral view of the atlantoaxial joint.  Annotated version here.  (Picture taken with a RX1)

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