(Redirected from Zygapophyseal Joints)
- 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
- 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).