Anatomy of the anterior & lateral compartments of the leg
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This document discusses the anatomy of the leg. It begins by describing the cutaneous nerve supply to the front and back of the leg, including the saphenous, common peroneal, musculocutaneous, and sural nerves. It then outlines the three compartments of the leg separated by intermuscular septa, containing the anterior, lateral, and posterior muscle groups. Several pages provide details on the muscles, arteries, and nerves of the anterior and lateral compartments. The document concludes with descriptions of the extensor and peroneal retinacula and their functions in maintaining tendon positions.
Anatomy of the anterior & lateral compartments of the leg
- 1. LEG (Anterior & Lateral) MOHAMED ELADL
- 2. SKELETON OF THE FOOT Dr M Eladl
- 3. SKELETON OF THE FOOT Dr M Eladl
- 4. CUTANEOUS NERVE SUPPLY OF THE LEG. Front of the leg: – Medial side: Saphenous nerve. – Lateral side: Common peroneal nerve (Lateral cutaneous nerve of the calf) for upper lateral part. Musclocutaneous nerve for the lower lateral part. Back of the leg: – Posterior cutaneous nerve of the thigh for the upper part. – Common sural nerve for the lower part. Dr M Eladl
- 5. COMPARTMENTS OF THE LEG The leg is subdivided into 3 compartments by the anterior and posterior intermuscular septa and the interosseous membrane between the interosseous borders of the tibia and fibula: 1. Anterior compartment: contains the extensor group of muscles. 2. Lateral compartment: contains the peroneal group of muscles. 3. Posterior compartment: contains the flexor group of muscles. Dr M Eladl
- 6. ANTERIOR COMPARTMENT OF THE LEG Four muscles 1. Tibialis Anterior 2. Extensor halucis longus. 3. Extensor digitorum longus 4. Peroneus tertius Dr M Eladl
- 7. ANTERIOR COMPARTMENT OF THE LEG Four muscles 1. Tibialis Anterior 2. Extensor halucis longus. 3. Extensor digitorum longus 4. Peroneus tertius Dr M Eladl
- 8. ANTERIOR COMPARTMENT OF THE LEG Four muscles 1. Tibialis Anterior 2. Extensor halucis longus. 3. Extensor digitorum longus 4. Peroneus tertius Anterior tibial Artery Anterior tibial nerve (deep peroneal nerve). Dr M Eladl
- 9. MUSCLES OF THE ANTERIOR COMPARTMENT Dr M Eladl
- 10. MUSCLES OF THE ANTERIOR COMPARTMENT Dr M Eladl
- 11. ANTERIOR TIBIAL ARTERY AND NERVE Dr M Eladl
- 12. ANTERIOR TIBIAL ARTERY 1) Origin 2) Enter the anterior comp Dr M Eladl
- 13. ANTERIOR TIBIAL ARTERY 3) Run in the anterior comp 4) Termination Dr M Eladl
- 14. ANTERIOR TIBIAL ARTERY Dr M Eladl Branches: 1. Posterior tibial recurrent 2. Anterior tibial recurrunt 3. Muscular Branches 4. Anterior medial malleoler 5. Posterior medial malleoler
- 15. ANTERIOR TIBIAL NERVE Dr M Eladl Origin:
- 16. ANTERIOR TIBIAL NERVE Dr M Eladl Origin: Course: – Enters the anterior compartment lateral to the artery (after piercing the lateral intermuscular septum)
- 17. ANTERIOR TIBIAL NERVE Dr M Eladl Origin: Course: – Enters the anterior compartment lateral to the artery (after piercing the lateral intermuscular septum). – Relations to the artery !!
- 18. ANTERIOR TIBIAL NERVE Dr M Eladl Origin: Course: Termination
- 19. ANTERIOR TIBIAL NERVE Dr M Eladl Origin: Course: Termination Branches: 1. Muscular 2. Articular 3. Terminal
- 20. ANTERIOR TIBIAL ARTERY AND NERVE Dr M Eladl
- 21. LATERAL COMPARTMENT OF THE LEG Dr M Eladl Two muscles 1. Peroneus longus 2. Peroneus brevis
- 22. LATERAL COMPARTMENT OF THE LEG Dr M Eladl Two muscles 1. Peroneus longus 2. Peroneus brevis Musculocutaneous nerve
- 23. MUSCLES OF THE LATERAL COMPARTMENT Dr M Eladl
- 24. MUSCLES OF THE LATERAL COMPARTMENT Dr M Eladl Peroneus longus muscle Peroneus brevis muscle Origin Lateral surface of the head of the fibula. Upper 2/3 of the lateral surface of the shaft of the fibula. Anterior & posterior intermuscular septa. Deep fascia. Lower 2/3 of the lateral surface of the shaft of the fibula. Anterior and posterior intermuscular septa Deep fascia Insertion Medial cuneiform & base of 1st metatarsal bone. Base of the 5th metatarsal bone. Nerve supply Superficial peroneal nerve Action 1) Eversion of the foot at the subtalar joint. 2) Planter flexion of the ankle joint. 3) Maintain the transverse arch of the foot. 1) Eversion of the foot at the subtalar joint. 2) Planter flexion of the foot at the ankle joint.
- 25. MUSCULOCUTANEOUS NERVE Dr M Eladl Origin:
- 26. MUSCULOCUTANEOUS NERVE Dr M Eladl Course:
- 27. MUSCULOCUTANEOUS NERVE Dr M Eladl Termination In the distal third of the leg, by piercing the deep fascia and divides into two branches; medial and lateral branches.
- 28. MUSCULOCUTANEOUS NERVE Dr M Eladl Branches 1. Muscular branches: to peroneus longus & brevis muscles. 2. Cutaneous branch: to the lower half of the anterior surface of the leg. 3. Terminal branches: Medial branch: supply: The medial side of the dorsum of the foot. Digital branches to the medial side of the big toe and the adjacent sides of the 2nd & 3rd toes. (the 2nd interdigital left)
- 29. MUSCULOCUTANEOUS NERVE Dr M Eladl Branches 1. Muscular branches: to peroneus longus & brevis muscles. 2. Cutaneous branch: to the lower half of the anterior surface of the leg. 3. Terminal branches: Lateral branch: supply: The intermediate part of the dorsum of the foot. Digital branches to the adjacent sides of the 3rd & 4th (the 3rd interdigital cleft) and 4th & 5th toes (the 4th interdigital cleft)
- 30. SUPERIOR EXTENSOR RETINACULUM Thickened band of deep fascia in the lower part of the front of the leg (above the ankle joint). Attachment: Medially: to lower part of the anterior border of tibia. Laterally: to lower part of the anterior border of fibula. Function: keeps the extensor tendons in contact with the lower end of the tibia during their contraction (prevent the spring out of the extensor tendon during their contraction). Dr M Eladl
- 31. INFERIOR EXTENSOR RETINACULUM Thick Y-shaped band of deep fascia in front of the ankle joint Attachment: The lateral end (the stem of Y): attached to the anterior part of upper surface of calcaneus Medially: The upper band: is attached to the medial malleolus. The lower band: passes to the medial side of the foot & fuses with the deep fascia of sole. Dr M Eladl
- 32. EXTENSOR RETINACULA Structures undercover of the retinaculua: from the medial to the lateral side: 1. Tibialis anterior 2. Extensor Hallucis longus 3. Anterior tibial Vessels 4. Anterior tibial Nerve 5. Extensor Digitorum longus 6. Peroneus tertius Dr M Eladl
- 33. PERONEAL RETINACULA Dr M Eladl Superior peroneal retinaculum Inferior peroneal retinaculum Definition Thickened bands of deep fascia on the lateral aspect of the ankle joint. Attachment: From the lateral malleolus to the lateral surface of the calcaneus Upper end: is attached to the anterior part of the superior surface of the calcaneus where it is continuous with the stem of the inferior extensor retinaculum. Lower end: is attached to the peroneal trochlea on lateral surface of the calcaneus Function: Keep the tendons of the peroneal muscles in position during their contraction
- 34. PERONEAL RETINACULA Dr M Eladl 1. Superior peroneal retinaculum From the lateral malleolus to the lateral surface of the calcaneus 2. Inferior Peroneal retinaculum Attached to the anterior part of the superior surface of the calcaneus where it is continuous with the stem of the inferior extensor retinaculum.
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