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Zygapophyseal Joint

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  • Only synovial joints in the spine
  • Composed of hyaline cartilage overlying subchondral bone, a synovial membrane and a joint capsule
  • Makes up the postero-lateral articulation between Vertebrae
  • Contains 1 to 2 ml of synovial fluid.
  • Menisci exist within joint space



Vascular Supply


  • The joint capsule and adjoining structures are richly innervated.
  • Each joint receives a dual nerve supply.
  • The articular branches arise from the medial branch of the posterior Primary Rami.
  • E.g. L4/L5 zygapophyseal joint receives supply from the L4 medial branch (corresponding segment) and the L3 medial branch (one level above).

Clinical Significance

See Also


Created by:
John Kiel on 28 May 2020 16:18:58
Last edited:
28 May 2020 21:10:09