The deep peroneal nerve gives an articular branch to the anterior ankle joint capsule as it crosses the ankle, supplying the anterior capsule, anterior talofibular ligament region, and the dorsal ankle capsule with sensory fibres.
The anterior ankle deep peroneal articular branch is involved in anterior ankle impingement pain and capsular tear pain. Anterior tarsal tunnel syndrome at the inferior extensor retinaculum compresses this branch alongside the main deep peroneal nerve. Its contribution to anterior ankle proprioception is relevant in chronic ankle instability rehabilitation.
Deep peroneal articular branch compression under the inferior extensor retinaculum producing dorsal ankle pain and first web space numbness, treated by retinaculum release.
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