The medial plantar nerve is the larger plantar nerve, supplying the medial plantar muscles and the medial 3.5 toes — the foot equivalent of the median nerve. It can be compressed by the abductor hallucis at the knot of Henry (where FHL and FDL cross) in jogger's foot — producing medial arch and plantar toe numbness in runners. Medial plantar nerve entrapment produces symptoms identical to tarsal tunnel syndrome but localised medially.
| Origin | Tibial nerve at the tarsal tunnel (larger of the two plantar nerve divisions) |
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Jogger's foot (medial plantar nerve entrapment beneath the abductor hallucis at the navicular) produces medial foot plantar burning in long-distance runners with high arch or over-pronation. Tinel's sign over the navicular confirms the entrapment location distinct from the tarsal tunnel. Orthotic correction of pronation and targeted steroid injection resolve most cases.
Medial plantar nerve entrapment at the abductor hallucis producing medial foot burning in runners managed with orthotics and injection.
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