Atlanto-occipital articulation

• Atlanto-occipital articulation

  • Synovial joint and ellipsoid joint
  • Concave facets on upper surface of atlas
  • Articulate with reciprocal convex occipital condyles on base skull

  A) atlantooccipital articulation

  
• Atlanto-occipital articulation

  • 20 ° total flexion/extension (nodding movement
  • ≈ 8 ° lateral flexion, minimal rotation

  A) atlantooccipital articulation