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Slideshow: Anterior Leg
The anterior leg compartment contains four muscles - Tibialis Anterior, Extensor Digitorum Longus, Extensor Hallucis Longus, and Peroneus Tertius. These muscles dorsiflex the ankle and extend the toes, arising from the tibia and fibula and inserting at various points on the foot. They are all supplied by the deep peroneal nerve. Injury to this nerve causes foot drop.
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Slideshow: Anterior Leg
- 1.
- 2. The anterior compartmentof the leg contains extensor muscles that dorsiflex the ankle joint
- 3. The anterior compartmentof the leg contains extensor muscles that dorsiflex the ankle joint There are four muscles
- 4. The anterior compartmentof the leg contains extensor muscles that dorsiflex the ankle joint There are four muscles Extensor Digitorum Longus Extensor Hallucis Longus Also extend the toes
- 5. The anterior compartmentof the leg contains extensor muscles that dorsiflex the ankle joint There are four muscles Extensor Digitorum Longus Extensor Hallucis Longus Tibialis Anterior Also extend the toes
- 6. The anterior compartmentof the leg contains extensor muscles that dorsiflex the ankle joint There are four muscles Extensor Digitorum Longus Extensor Hallucis Longus Tibialis Anterior – also inverts the foot Also extend the toes
- 7. The anterior compartmentof the leg contains extensor muscles that dorsiflex the ankle joint There are four muscles Extensor Digitorum Longus Extensor Hallucis Longus Tibialis Anterior – also inverts the foot Peroneus Tertius Also extend the toes
- 8. The anterior compartmentof the leg contains extensor muscles that dorsiflex the ankle joint There are four muscles Extensor Digitorum Longus Extensor Hallucis Longus Tibialis Anterior – also inverts the foot Peroneus Tertius – also known as Fibularis Tertius Also extend the toes
- 9. Cross Section throughmiddle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A L
- 10. Tibi a Fibula Cross Section throughmiddle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A L
- 11. Septum Septum Interosseous Membrane Tibi a Fibula Cross Section throughmiddle of right leg looking up from foot anterioranterior posteriorposterior L A T E R A L M E D I A L
- 12. Tibi a Fibula Cross Section throughmiddle 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
- 13. Tibi a Fibula Cross Section throughmiddle 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
- 14. Tibi a Fibula Cross Section throughmiddle 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 Superficial Posterior Compartment
- 15. Tibi a Fibula Cross Section throughmiddle 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 Superficial Posterior Compartment
- 16. Tibi a Fibula Cross Section throughmiddle 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 Superficial Posterior Compartment
- 17. Deep Posterior Compartment Tibi a Fibula Tibialis Anterior CrossSection 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 Superficial Posterior Compartment
- 18. Deep Posterior Compartment Tibi a Fibula Tibialis AnteriorTibialisAnterior ExtensorExtensor HallucisHallucis LongusLongus 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 Superficial Posterior Compartment
- 19. Deep Posterior Compartment Tibi a Fibula Tibialis AnteriorTibialisAnterior ExtensorExtensor HallucisHallucis LongusLongus Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior ExtensorExtensor DigitorumDigitorum LongusLongus L A T E R A L M E D I A L Deep Posterior Compartment Lateral Compartment Superficial Posterior Compartment
- 20. Deep Posterior Compartment Tibi a Fibula Tibialis AnteriorTibialisAnterior ExtensorExtensor HallucisHallucis LongusLongus Cross Section through middle of right leg looking up from foot anterioranterior posteriorposterior ExtensorExtensor DigitorumDigitorum LongusLongus L A T E R A L M E D I A L Deep Posterior Compartment Lateral Compartment Superficial Posterior Compartment
- 21.
- 22. Tibialis Anterior arises from lateralsurface of shaft of Tibia attaches to Medial Cuneiform 1st Metatarsal base
- 23. Tibialis anterior muscleTibialisanterior muscle Tibialis anterior tendonTibialis anterior tendon Tibialis Anterior arises from lateral surface of shaft of Tibia attaches to Medial Cuneiform 1st Metatarsal base
- 24. Tibialis Anterior Dorsiflexes anklejoint Inverts foot Tibialis anterior muscleTibialis anterior muscle Tibialis anterior tendonTibialis anterior tendon
- 25.
- 26. Extensor Digitorum Longus Arisesfrom Fibula Interosseous Membrane
- 27. Extensor Digitorum Longus Arisesfrom Fibula Interosseous Membrane The tendon divides into four slips and these insert into the dorsal expansions of toes 2-5
- 28. The tendon dividesinto four slips and these insert into the dorsal expansions of toes 2-5
- 29. Extensor Digitorum Longus Dorsiflexesthe ankle joint Extends the toes
- 30.
- 31. Extensor Hallucis Longus Arisesfrom the Fibula
- 32. Extensor Hallucis Longus Arisesfrom the Fibula Inserts onto the Distal Phalanx of Big Toe
- 33. Tendon of Extensor HallucisLongus Extensor Hallucis Longus Extends the Big Toe Dorsiflexes Ankle Joint
- 34. Peroneus Tertius also knownas Fibularis Tertius
- 35. Peroneus Tertius Arises fromthe Fibula
- 36. Peroneus Tertius Arises fromthe Fibula Inserts onto dorsum of 5th metatarsal base
- 37. Peroneus Tertius Tendon ofPeroneus Tertius
- 38. Tendon of PeroneusTertius Peroneus Tertius Everts foot Dorsiflexor of the foot
- 39. Extensor Retinacula arethickenings of deep fascia that prevent ‘bowstringing’ of the extensor tendons
- 40. Extensor Retinacula arethickenings of deep fascia that prevent ‘bowstringing’ of the extensor tendons Superior extensor retinaculum Inferior extensor retinaculum
- 41.
- 42. All the musclesin the Anterior Compartment are supplied by the Deep Peroneal Nerve
- 43. Deep Peroneal Nerve Injuryto this nerve causes a condition known as ‘foot drop’ The foot can no longer be dorsiflexed which causes difficulty in walking The knee has to be lifted much higher in order to prevent the foot from dragging on the ground This is called a ‘High Stepping Gait’
- 44.
- 45. Anterior Leg Tibialis Anterior OriginLateral condyle of tibia, proximal 2/3rds lateral surface tibia, interosseous membrane Insertion Medial and plantar surfaces of medial cuneiform and base of first metatarsal Action Dorsiflexor of ankle, invertor of foot Nerve Supply Deep peroneal nerve (L4, L5) Blood Supply Anterior tibial artery
- 46. Extensor Digitorum Longus OriginHead of fibula, upper 2/3 anterior fibular shaft, interosseous membrane Insertion Splits into 4 tendons distally; these insert onto dorsum of middle and distal phalanges of toes 2-5. Part of extensor expansion complex Action Extends toes 2 - 5 and dorsiflexes ankle Nerve Supply Deep peroneal nerve (L5, S1) Blood Supply Anterior tibial artery Anterior Leg
- 47. Extensor Hallucis Longus OriginAnterior surface of the fibula, interosseous membrane Insertion Base of distal phalanx great toe Action Extends great toe and dorsiflexes ankle Nerve Supply Deep peroneal nerve (L5, S1) Blood Supply Anterior tibial artery Anterior Leg
- 48. Anterior Leg Fibularis Tertius OriginDistal 1/3rd anterior surface of fibula Insertion Base of dorsal aspect 5th metatarsal Action Dorsiflexes foot; everts foot weakly Nerve Supply Deep peroneal nerve (L5, S1) Blood Supply Anterior tibial artery