Question

Compare and contrast the differences between the atlanto-occipital (AO) joint and the atlantoaxial (AA) joint with regard to:

1. the name of the 2 bones that articulate to create the joint
2. classification of the synovial joint by movement (example: the elbow is uniaxial)
3. classification of the synovial joint by shape (example: the elbow is a hinge joint)
4. ALL types of movements that can be performed by the joint (depression, elevation, lateral flexion, retraction, etc.?).

You may use a table to keep things organized but it must be clearly labeled.

Answer 1

a. Atlanto occipital joint - Joint between the first cervical vertebrae (atlas) and occipital Bone

Atlantoaxial joint - Joint between the first (atlas) and second cervical vertebrae ( axis ).

b.atlanto occipital joint - BIAXIAL

atlanto axial joint - uniaxial

c. Atlanto occipital joint - Condyloid joint

Atlantoaxial joint - pivot joint

d. Atlanto occipital movements - flexion of head , extension of head and lateral flexion of head

Atlantoaxial joint movements - Head rotation

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