Atlanto-axial articulation

• Atlanto-axial articulation (C1-C2)

  • Two joints both the within the loose capsule:
  • Lateral
  • Median

  A) medial atlantoaxial joint

  B) lateral atlantoaxial joint

  
• Atlanto-axial articulation (C1-C2):

  • Movements:
  • Rotation: 15 ° R&L
  • Minimal flexion & extension

  A) atlantoaxial articulation

  
• Atlanto-axial articulation (C1-C2)

  • Transverse ligament of atlas
  • Holds dens in place against atlas
  • Together with longitudinal bands forms the ‘cruciform’ ligament

  A) Transverse ligament of atlas

  B) Atlanto-axial articulation

  
• Atlanto-axial articulation (C1-C2)

  • Alar ligaments
  • Project from dens up to occipital condyles

  A) Alar ligaments

  B) Atlanto-axial articulation