This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Orthopaedics
Left-Right movement of skull occurs at 
Select and explain. 
A. C2 - C3, B. Atlanto - occipital joint, C. Atlanto - axial joint, D. C4 - C5
C: Atlanto - axial joint
Answer: C: Atlanto - axial joint 
Explanation: Left-Right movement of skull occurs at Atlanto - axial joint.
Up - down movement of skull occurs at Atlanto - occipital joint.