The common peroneal nerve provides articular branches to the anterolateral knee capsule, the proximal tibiofibular joint, and the lateral meniscus before dividing at the fibular head. These branches provide sensory innervation to the posterolateral corner and lateral joint structures.
The peroneal articular branches are targeted in lateral knee denervation procedures for anterolateral instability pain and lateral compartment osteoarthritis. They are at risk during posterolateral corner reconstruction, where excessive dissection around the fibular head can damage these branches as well as the main peroneal trunk. Anterolateral ligament repair and posterolateral corner reconstruction must preserve peroneal articular branch function to maintain lateral knee proprioception.
Numbness and proprioceptive impairment over the anterolateral knee from peroneal articular branch injury during lateral or posterolateral knee surgery, contributing to persistent instability symptoms despite structural repair.
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