MSA3 Ankle Movers

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  1. What are the three dorsiflexors?
    • Tibialis anterior
    • Extensor digitorum longus
    • Peroneus tertius
  2. O/I of Tibialis anterior
    • (shin muscle)
    • Origin: Lateral tibial condyle; proximal lateral shaft of tibia; interosseous membrane
    • Insertion: Medial cuneiform; plantar base of 1st metatarsal
    • (confirmation: toes up)
  3. O/I of Extensor digitorum longus
    • Origin: Lateral tibial condyle; proximal anterior shaft of fibula; interosseous membrane
    • Insertion: Middle and distal phalanges of digits 2-5
    • (confirmation: foot piano)
  4. O/I of Peroneus tertius
    • Origin: Anterior surface of distal 1/3 of fibula
    • Insertion: Dorsal base of 5th metatarsal
    • (no palpation)
  5. What are the three plantarflexors?
    • Gastrocnemius
    • Soleus
    • Plantaris
  6. O/I of Gastrocnemius
    • Origin: Posterior medial and lateral condyles of femur
    • Insertion: Calcaneus via the calcaneal tendon
    • (crosses two joints- knee and ankle)
  7. O/I of Soleus
    • Origin: Soleal line of tibia; Posterior surface of tibia; posterior aspect of head of the fibula
    • Insertion: Calcaneous via calcaneal tendon
  8. O/I of Plantaris
    • Origin: Lateral supracondylar ___ of femur
    • Insertion: Calcaneous via the calcaneal tendon
    • (Vestigal- no palpation)
  9. What is the common insertion of the plantarflexors?
    • Calcaneous via the calcaneal tendon
    • Ropy as all get-out
  10. What is the only superficial plantarflexor?
  11. What is the only plantarflexor that crosses two joints?
    • Gastrocnemius
    • Crosses knee and ankle
  12. What are the three invertors?
    • Tom, Dick and Harry
    • Tibialis posterior
    • Flexor digitorum longus
    • Flexor hallicus longus
  13. O/I of Tibialis Posterior
    • Origin: Proximal, posterior shafts of tibia and fibula; interosseous membrane
    • Insertion: All 5 tarsal bones; base of 2-4 metatarsals
  14. O/I of Flexor digitorum longus
    • Origin: Distal 2/3 of posterior tibia
    • Insertion: Distal phalanges of digits 2-5
    • (looks like a feather)
  15. O/I of Flexor hallicus longus
    • Origin: Middle half of posterior fibula
    • Insertion: Distal phalanx of great toe
    • (no palpation)
  16. What does hallicus/hallux mean?
    Big toe
  17. What is the tendon type and depth of the inverters
    Ropy and deep
  18. What are the two evertors?
    • Peroneus longus
    • Peroneus brevis
  19. O/I of Peroneus longus
    • Origin: Head of fibula and proximal 2/3 of lateral fibula
    • Insertion: Plantar base of 1st metatarsal; plantar surface of medial cuneiform
  20. O/I of Peroneus Brevis
    • Origin: Distal 2/3 of lateral fibula
    • Insertion: Tuberosity of 5th metatarsal
  21. What is the superficial evertor?
    Peroneus longus
  22. What type of tendon do the evertors have?
  23. Which two ankle movers share an insertion? What is that insertion?
    • Tibialis anterior
    • Peroneus longus
    • Insertion: plantar base of 1st metatarsal; plantar surface of medial cuneiform
Card Set
MSA3 Ankle Movers
Muscles that move the ankle; LP 11 & 12
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