Tibial Nerve (Knee Level)

nervus tibialis (nivel genus)

The tibial nerve at the knee level is the larger sciatic division, passing through the centre of the popliteal fossa alongside the popliteal vessels. It is less commonly injured at this level than the common fibular nerve because of its central, protected position. Popliteal artery aneurysm thrombosis can produce tibial nerve compression from haematoma. The tibial nerve gives branches to gastrocnemius and popliteus at this level before continuing into the leg.

Region: Knee

Anatomical Data

Origin, Insertion & Supply

Origin	Sciatic nerve bifurcation at the popliteal fossa

Clinical Relevance

Clinical Notes

Tibial nerve injury at the popliteal fossa from posterior knee dislocation, popliteal cyst rupture, or direct trauma produces plantarflexion weakness and plantar foot anaesthesia — complete tibial palsy produces an anaesthetic plantar foot at high risk of pressure ulceration. Foot padding and regular pressure relief are essential in tibial nerve palsy.

Pathology

Common Injuries & Conditions

Tibial Nerve Palsy

Plantarflexion weakness and plantar anaesthesia from popliteal tibial nerve injury managed with moulded ankle foot orthosis and meticulous foot care to prevent pressure ulcers.