Geniculate Nerve Branches of the Knee

rami articulares geniculares

The geniculate (articular) branches of the knee arise from the tibial and common fibular nerves in the popliteal fossa to innervate the posterior knee capsule, the ACL, the PCL, and the posterior synovium. The superior lateral geniculate nerve arises from the common fibular nerve; the superior medial and inferior medial geniculate nerves arise from the tibial nerve. These posterior branches complement the anterior genicular nerves (from the saphenous, femoral, and obturator systems) to provide the comprehensive knee joint innervation.

Region: Knee

Clinical Relevance

Clinical Notes

The geniculate nerve branches are the targets for genicular nerve RFA in knee osteoarthritis and chronic post-arthroplasty pain. The standard five-point technique targets the superomedial, superolateral, and inferomedial genicular nerves. The posterior geniculate branches are less accessible percutaneously and are addressed by popliteal plexus nerve blocks. Posterior knee pain after arthroplasty may be driven by posterior capsular geniculate nerve sensitisation that is not addressed by standard anterior genicular RFA.

Pathology

Common Injuries & Conditions

Posterior Geniculate Nerve Sensitisation in Posterior Knee Pain

Posterior knee pain after total knee arthroplasty may represent sensitisation of the posterior geniculate nerve branches supplying the posterior capsule and remaining cruciate ligament remnants; popliteal plexus block with local anaesthetic provides diagnostic confirmation and guides decision for posterior genicular RFA targeting the tibial nerve posterior articular branches.