C1 is at the top of the spine and supports your skull. C2 lies just below C1 and has an upward peg that enters a hole in C1. The peg lets C1 pivot on C2, which allows you to turn your head sideways.

Your spine is composed of a stack of bones called vertebrae. They protect your spinal cord. A Jefferson fracture is another name for a bone fracture of the front and back arches of the C1 vertebra ...

Traditional methods of atlantoaxial fusion involve using wires and bone grafts, but these require external support in the postoperative period, including halo devices. Methods of rigid fixation with ...