Facet (Zygapophyseal) Joints

• Facet Joints (Zygapophyseal joints):

  • Synovial plane joint
  • Facets sloped anterior to posterior which allows a large amount flexion and extension

  A) facet joint

  
• Facet Joints (Zygapophyseal joints):

  • Movements:
  • Lateral flexion
  • Rotation to each side
  • Flexion
  • Extension

  A) facet joint

  
• Facet Joints (Zygapophyseal joints):

  • Movements:
  • Flexion (≈ 25 °)
  • Extension (≈ 85 °)
  • ≈ 40 ° lateral flexion
  • ≈ 50 ° rotation to each side

  A) facet joint