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Muscles of the Foot, Ankle, Lower Leg

Muscles of the Foot, Ankle, Lower Leg. Gastrocnemius. Origin Medial head medial femoral condyle; Lateral head lateral condyle Insertion the Achilles tendon, inserting on the middle 1/3 of the posterior calcaneal surface Action Powerful plantar flexor of ankle

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Muscles of the Foot, Ankle, Lower Leg

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  1. Muscles of the Foot, Ankle, Lower Leg

  2. Gastrocnemius • Origin • Medial head medial femoral condyle; • Lateral head lateral condyle • Insertion the Achilles tendon, inserting on the middle 1/3 of the posterior calcaneal surface • Action Powerful plantar flexor of ankle • InnervationTibial nerve (S1, S2)

  3. Gastrocnemius-medial head

  4. Gastrocnemius-medial head

  5. Gastrocnemius-medial head

  6. Gastrocnemius-lateral head

  7. Gastrocnemius-lateral head

  8. Aponeurosis of Gastrocnemius

  9. Soleus • Origin fibular head, Insertion Achilles tendon, inserting on the middle 1/3 of the posterior calcaneal surface • Action Powerful plantar flexor of ankle • Innervation Tibial nerve (S1, S2)

  10. Soleus

  11. Soleus

  12. Soleus

  13. Soleus

  14. Plantaris • Origin supracondylar line of distal femur • Insertion Middle 1/3 of the posterior calcaneal surface, just medial to Achilles tendon • Action Plantar flexor of ankle; also flexes knee • Innervation Tibial nerve (L5, S1, S2)

  15. Plantaris

  16. Plantaris

  17. Plantaris

  18. Achilles Tendon

  19. Achilles Tendon

  20. Achilles Tendon

  21. Tibialis Posterior • Origin medial fibula, • Insertion 2 • superficial slip inserts on the tuberosity of the navicular bone; • deeper slip plantar sufraces of metatarsals 2 - 4 and second cuneiform • Action Principal invertor of foot • Innervation Tibial nerve (L4, L5)

  22. Tibialis Posterior

  23. Tibialis Posterior

  24. Tibialis Posterior

  25. Flexor Digitorum Longus • Origin Posterior surface of tibia • Insertion Splits into four slips these slips then insert on plantar surface of bases of 2nd - 5th distal phalanges • Action Flexes toes 2 - 5; also helps inversion of ankle • Innervation Tibial nerve

  26. Flexor Digitorum Longus

  27. Flexor Digitorum Longus

  28. Flexor Digitorum Longus

  29. Flexor Digitorum Longus

  30. Flexor Digitorum Longus

  31. Flexor Hallucis Longus • Origin Inferior 2/3 of posterior surface of fibula, • Insertion Plantar surface of base of distal phalanx of great toe • Action Flexes great toe, helps to invert ankle • Innervation Tibial nerve

  32. Flexor Hallucis Longus

  33. Flexor Hallucis Longus

  34. Flexor Hallucis Longus

  35. Flexor Hallucis Longus

  36. Flexor Hallucis Longus

  37. Tibialis Anterior • Origin Lateral condyle of tibia, • Insertion 1st cuneiform and on base of first metatarsal • Action Dorsiflexor of ankle • Innervation Deep peroneal nerve (L4, L5, S1)

  38. Tibialis Anterior -origin

  39. Tibialis Anterior

  40. Tibialis Anterior

  41. Tibialis Anterior

  42. Extensor Hallucis Longus • Origin Anterior fibula and the interosseous membrane • Insertion Base and dorsal center of distal phalanx of great toe • Action Extends great toe and dorsiflexes ankle • Innervation Deep peroneal nerve (L4, L5, S1)

  43. Extensor Hallucis Longus

  44. Extensor Hallucis Longus

  45. Extensor Hallucis Longus

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