This nerve also arises from the division of the sciatic nerve in the popliteal fossa and descends behind the tibia, terminating in the medial and lateral plantar nerves which innervate the small muscles of the foot. The sensory branch contributes to the sural nerve. Damaged by:
- Trauma in the popliteal fossa.
- Fracture of the tibia.
- Systemic causes of mononeuropathy. Results in:
- Weakness of plantar flexion and inversion of the foot.
- The patient cannot stand on toes.
- Sensory loss involves the sole of the foot.
- The ankle reflex is lost.
Flexor digitorum longus
Flexor hallucis -'' longus r
Medial and --lateral plantar nerves
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