1. Where do the two peroneal tendons insert?
2. What is the function of the peroneus longus?
3. What is the mechanism of peroneal tendon injury?
4. What is seen clinically with peroneal tendon injury?
5. What is the treatment of peroneal tendon injury?
Answers:
1. Peroneus brevis: base of 5th metatarsal. Peroneus longus: base of 1st metatarsal.
2. Plantarflexes ankle and everts foot.
3. Rupture is caused by repetitive forceful eversion causing inflammation or degeneration. Dislocation can be caused by sudden DF, common in a skiing injury.
4. Swelling in retromalleolar area, sudden weakness with inability to evert foot. Provocative test is pain with resisted DF and eversion.
5. If just tenosynovitis, should be treated similarly to lateral ankle sprain. If rupture or dislocation, send for ortho eval.
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