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Slideshow: Posterior Leg

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Slideshow: Posterior Leg

The Funky Professor videos can be viewed here;
http://publishing.rcseng.ac.uk/journal/video?videoTaxonomy=FUNK

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Slideshow: Posterior Leg

  1. 1. Posterior Leg Compartment
  2. 2. The posterior compartment of the leg contains flexor muscles that plantarflex the ankle joint
  3. 3. The posterior compartment of the leg contains flexor muscles that plantarflex the ankle joint There is a Superficial Posterior Compartment and a Deep Posterior Compartment
  4. 4. The posterior compartment of the leg contains flexor muscles that plantarflex the ankle joint There are 3 muscles in the Superficial Compartment
  5. 5. There are 3 muscles in the Superficial Compartment •Gastrocnemius •Plantaris •Soleus The posterior compartment of the leg contains flexor muscles that plantarflex the ankle joint
  6. 6. There are 4 muscles in the Deep Compartment •Popliteus •Flexor Digitorum Longus •Flexor Hallucis Longus •Tibialis Posterior The posterior compartment of the leg contains flexor muscles that plantarflex the ankle joint
  7. 7. Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A L
  8. 8. Tibi a Fibula Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A L
  9. 9. Septum Septum Interosseous membrane Tibi a Fibula Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A L
  10. 10. Tibi a Fibula Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A L Anterior Compartment
  11. 11. Tibi a Fibula Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A L Anterior Compartment Lateral Compartment
  12. 12. Tibi a Fibula Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A L Anterior Compartment Lateral Compartment
  13. 13. Tibi a Fibula Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A L Anterior Compartment Lateral Compartment Deep Posterior Compartment
  14. 14. Tibi a Fibula Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A L Superficial Posterior Compartment Deep Posterior Compartment Lateral Compartment Anterior Compartment
  15. 15. Muscles of the Superficial Posterior Compartment
  16. 16. Gastrocnemius Gastrocnemius Arises as two heads from the posterior surface of the Medial and Lateral Femoral Condyles Posterior view, right leg
  17. 17. Tibi a Fibula Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A LLateral Compartment Anterior Compartment GastrocnemiusGastrocnemius Medial HeadMedial Head GastrocnemiusGastrocnemius Lateral headLateral head Deep Posterior Compartment
  18. 18. Soleus Originates from the •posterior aspect of the fibular head •Fibular shaft •Tibial shaft
  19. 19. Tibi a Fibula Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A LLateral Compartment Anterior Compartment GastrocnemiusGastrocnemius Medial headMedial head GastrocnemiusGastrocnemius Lateral headLateral head SoleusSoleus Deep Posterior Compartment
  20. 20. Soleus and Gastrocnemius merge to form the Achilles tendon This tendon inserts onto the posterior and superior surfaces of the Calcaneum
  21. 21. Plantaris This slender muscle arises from the Lateral Supracondylar ridge of the Femur and inserts onto the Calcaneum just medial to the Achilles Tendon
  22. 22. Tibi a Fibula Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A L Deep Posterior Compartment Lateral Compartment Anterior Compartment GastrocnemiusGastrocnemius Medial headMedial head GastrocnemiusGastrocnemius Lateral headLateral head SoleusSoleus PlantarisPlantaris
  23. 23. Muscles of the Deep Posterior Compartment
  24. 24. Popliteus Originates from the posterior aspect of the upper Tibia
  25. 25. Popliteus Originates from the posterior aspect of the upper Tibia Inserts onto lateral surface of lateral condyle of Femur
  26. 26. Popliteus This muscle contributes to the function of the knee joint by unlocking the extended leg and rotating the Femur on the Tibia Originates from the posterior aspect of the upper Tibia Inserts onto lateral surface of lateral condyle of Femur
  27. 27. Tibialis Posterior Originates from the posterior aspects of the •Interosseous membrane •Fibular shaft •Tibial shaft
  28. 28. Tibialis Posterior Inserts onto the Navicular, and sends extensions to other tarsal bones and metatarsals Originates from the posterior aspects of the •interosseous membrane •fibular shaft •tibial shaft
  29. 29. Tibialis Posterior This is the principal invertor of the foot Inserts onto the navicular, and sends extensions to other tarsal bones and metatarsals Originates from the posterior aspects of the •interosseous membrane •fibular shaft •tibial shaft
  30. 30. Tibi a Fibula Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A LLateral Compartment Anterior Compartment GastrocnemiusGastrocnemius Medial headMedial head GastrocnemiusGastrocnemius Lateral headLateral head SoleusSoleus PlantarisPlantaris Tibialis PosteriorTibialis Posterior
  31. 31. Originates from the posterior aspect of the Tibial shaft Flexor Digitorum Longus
  32. 32. Originates from the posterior aspect of the Tibial shaft Flexor Digitorum Longus Splits into 4 tendons which insert onto the distal phalanges of toes 2-5
  33. 33. Originates from the posterior aspect of the tibial shaft Flexor Digitorum Longus Flexes the toes Splits into 4 tendons which insert onto the distal phalanges of toes 2-5
  34. 34. Tibi a Fibula Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A LLateral Compartment Anterior Compartment GastrocnemiusGastrocnemius Medial headMedial head GastrocnemiusGastrocnemius Lateral headLateral head SoleusSoleus PlantarisPlantaris Tibialis PosteriorTibialis Posterior Flexor DigitorumFlexor Digitorum LongusLongus
  35. 35. Flexor Hallucis Longus Originates from the posterior aspect of the Fibular shaft and Interosseous Membrane
  36. 36. Flexor Hallucis Longus Originates from the posterior aspect of the Fibular shaft and Interosseous Membrane Inserts onto the distal phalanx of the big toe
  37. 37. Flexor Hallucis Longus Originates from the posterior aspect of the Fibular shaft and Interosseous Membrane Inserts onto the distal phalanx of the big toe Flexes the big toe
  38. 38. Tibi a Fibula Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A LLateral Compartment Anterior Compartment GastrocnemiusGastrocnemius Medial headMedial head GastrocnemiusGastrocnemius Lateral headLateral head SoleusSoleus PlantarisPlantaris Tibialis PosteriorTibialis Posterior Flexor DigitorumFlexor Digitorum LongusLongus Flexor Hallucis LongusFlexor Hallucis Longus
  39. 39. Nerve Supply
  40. 40. All the muscles of the Posterior Compartment of the Leg are supplied by the Tibial Nerve a terminal branch of the Sciatic Nerve
  41. 41. Tibi a Fibula Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A LLateral Compartment Anterior Compartment GastrocnemiusGastrocnemius Medial headMedial head GastrocnemiusGastrocnemius Lateral headLateral head SoleusSoleus PlantarisPlantaris Tibialis PosteriorTibialis Posterior Flexor DigitorumFlexor Digitorum LongusLongus Flexor Hallucis LongusFlexor Hallucis Longus Tibial Nerve
  42. 42. Summary of Muscles
  43. 43. Gastrocnemius Origin Medial head: posterior surface of medial femoral condyle Lateral head: posterior surface of lateral femoral condyle Insertion The two heads unite and with soleus form the Achilles tendon, which inserts onto the posterior and upper surface of calcaneum Action Powerful plantar flexor of ankle Nerve Supply Tibial nerve ( S1, S2) Blood Supply Sural branches of the popliteal artery Posterior Leg
  44. 44. Soleus Origin Posterior aspect of fibular head, posterior surface of upper fibular shaft, soleal line on posterior tibia and medial border of tibia Insertion unites with gastrocnemius aponeurosis to form the Achilles tendon, inserts onto posterior and upper surfaces of calcaneum Action Plantar flexor of ankle Nerve Supply Tibial nerve (S1, S2) Blood Supply Posterior tibial, peroneal, and sural arteries Posterior Leg
  45. 45. Plantaris Origin Inferior aspect of lateral supracondylar ridge of distal femur Insertion Posterior calcaneal surface, medial to Achilles tendon Action Plantar flexor of ankle; also flexes knee Nerve Supply Tibial nerve (L5, S1, S2) Blood Supply Sural arteries Posterior Leg
  46. 46. Popliteus Origin Posterior surface of tibia, superior to soleal line Insertion Lateral surface of lateral condyle of femur. The tendon passes into the capsule of the knee and gives an extension to posterior part of lateral meniscus Action Unlocks the extended knee by laterally rotating the femur on the tibia. Nerve Supply Tibial nerve (L4, L5, S1) Blood Supply Medial inferior genicular branch of popliteal artery, posterior tibial artery Posterior Leg
  47. 47. Tibialis Posterior Origin Posterior aspect interosseous membrane, superior half of tibia and medial posterior surface of fibula Insertion Inserts onto navicular tuberosity and sends extensions to other tarsal bones and metatarsals Action Inverts, adducts, supinates foot, plantar flexes ankle Nerve Supply Tibial nerve (L4, L5) Blood Supply sural, peroneal and posterior tibial arteries Posterior Leg
  48. 48. Flexor Digitorum Longus Origin Posterior surface of tibia distal to soleal line Insertion Splits into four slips, inserts onto plantar surface of bases of distal phalanges of 2nd -5th toes Action Flexes toes 2 - 5; also helps in plantar flexion of ankle Nerve Supply Tibial nerve (S1, S2) Blood Supply Muscular branches of posterior tibial artery Posterior Leg
  49. 49. Flexor Hallucis Longus Origin Inferior 2/3 of posterior surface of fibula, lower part of interosseous membrane Insertion Plantar surface of base of distal phalanx of great toe Action Flexes great toe, supinates ankle, weak ankle plantar flexor Nerve Supply Tibial nerve (S2, S3) Blood Supply Muscular branches of peroneal and posterior tibial artery Posterior Leg
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Slideshow: Posterior Leg The Funky Professor videos can be viewed here; http://publishing.rcseng.ac.uk/journal/video?videoTaxonomy=FUNK

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