Evertor and invertor of foot

muscles of anterior and posterior compartment of leg helps in inversion and eversion

1. Evertor and Invertor of foot Dr. Tulika chaudhary

2. Primary: Peroneus longus Peroneus brevis Secondary: Peroneus tertius Extensor digitorum longus Evertor of foot

3. Eversion of foot

4. O rigin : Upper 2/3 rd of the outer surface of fibula Insertion :undersurface of 1 st cuneiform & 1 st metatarsal Passes posteriorly lateral malleolus Primary pronator of subtalar joint Peroneus longus

5. Evertor of foot Planterflexor Peroneus longus

6. Origin : lower 2/3 rd of outer surface of the fibula Insertion : lateral side of the base of the 5 th metatarsal Passes posteriorly to the lateral malleolus It is also primary pronator of subtalar joint Peroneus brevis

7. Eversion Planterflexion Peroneus brevis

8. Peroneus longus and brevis muscles pass lateral to the subtalar joint . Their primary function are pronation of subtalar joint Their tendon passes posterior but close to ankle axis and thus they are weak planter flexor Note:

9. Origin : Lower fibula Insertion : dorsal surface of 5 th metatarsal Passes anterior to lateral melleolus Peroneus tertius

10. Eversion D orsiflexion Peroneus tertius

11. Subtalar & talocrural joint axis

12. Origin : lateral condyle of tibia & anterior surface of fibula Insertion : middle & distal phalanges of four lateral toes Passes anterior to lateral malleolus Extensor digitorum longus

13. Toe extension Dorsiflexion Eversion Extensor digitorum longus

14. Tibialis anterior Tibialis posterior Flexor hallucis longus Flexor digitorum longu s Extensor hallucis longus Invertors of foot

15. Origin : Lateral tibial condyle & 2/3 rd of the shaft Insertion : medial cuneiform & 1 st metatarsal Passes anterior to medial malleolus Tibialis anterior muscles passes medial to subtalar axis and is a key supinator of the subtalar and transverse talar joints Tibialis anterior

16. Inversion of foot

17. Inversion Dorsiflexion of foot Support medial arch of foot Tibialis anterior

18. Ori gin : Posterior surface of the upper half of the adjacent surface of tibia & fibula Insertion : Navicular ,cuneiform & cuboid bones and base of the 2 nd -5 th metatarsal Passes posterior to medial melleolus Tibialis posterior

19. Planterflexion Inversion Tibialis posterior

20. Origin :middle half of the posterior surface of the fibula Insertion :distal phalanx of the great toe,planter surface Passes posteriorly to medial melleolus Flexor hallucis longus

21. Flexion of big toe Planterflexion Inversion of foot Flexor hallucis longus

22. Origin: middle 1/3 rd of the posterior surface of tibia Insertion: base of the distal phalanges of each of lateral four toes Passes posterior to medial malleolus Flexor digitorum longus

23. Inversion of foot Planterflexion of ankle Toe flexion Flexor digitorum longus

24. Origin : Middle 2/3 rd of inner surface of front of the fibula Insertion :top of the distal phalanx of the great toe Passes anteriorly Extensor hallucis longus

25. Dorsiflexion Inversion Extension of great toe Extensor hallucis longus