This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Osteology of Head and Neck, Subject name: Anatomy
Flexion extension in neck occurs at - 
Select and explain. 
A. Atlanto-axial joint, B. Atlanto-occipital joint, C. C6-C7 joint, D. C7-T1 joint
B: Atlanto-occipital joint
Answer: B: Atlanto-occipital joint 
Explanation: Ans. is 'b' i.e., Atlanto-occipital joint o Atlantoaxial joint - Rotatory movement around vertical axis (Right to left and left to right movements).o Atlanto-occipitai joint - (i) Flexion-extension around transverse axis, (ii) Slight lateral flexion around antero-posterior axis.Also knowo Atlanto-occipital joint:- Median........................ Pivot joint.- Lateral .........................Plane synovial joint.o Atlantoaxial joint ............Ellipsoid joint.