~, /' ~::'~ EXTENSOR HALLUCIS LONGUS. Leg-anterolateral :.:~ / ~\,

Transcription

1 TIBIALIS ANTERIOR Lateral condyle of tibia, upper half of lateral surface of tibia, interosseous membrane Medial side and plantar surface of medial cuneiform bone, and base of first metatarsal bone Dorsiflexes foot at ankle joint, inverts (supinates) foot Deep peroneal nerve (L4, L5, S1) Leg-anterolateral

2 EXTENSOR HALLUCIS LONGUS Middle half of anterior surface of fibula and interosseous membrane Base of distal phalanxof great toe Extends great toe, dorsiflexes and inverts (supinates) foot Deep peroneal nerve (L4, L5, S1) :, / L/.< /.. f. / ~, /' ':'\' /' '.':~~:./ :.:~ / ',.,,',,- ",,\ ;'\' " ~\, r',' ~::'~ ',,\ ~:',\~.:,'.,','" '),\ ::~ Leg-anterolateral

3 EXTENSOR DIGITORUM LONGUS Foot-anterolateral Upper two-thirds of anterior surface of fibula, interosseous membrane, lateral condyle of tibia Along dorsal surface of four lateral toes, and then to bases of middle and distal phalanges Extends toes, dorsiflexes foot at ankle, everts foot Deep peroneal nerve (L4, L5, S1) Note: The lower lateral part of this muscle makes a separate insertion onto the dorsal surface of the fifth metatarsal and is called peroneus tertius. Leg-anterolateral

4 PERONEUS TERTIUS (Lower lateral part of extensor digitorum longus) Lower third of anterior surface of fibula and interosseous membrane Dorsal surface of base of fifth metatarsal bone Dorsiflexes and everts foot Deep peroneal nerve (L4, L5, S1) Leg-anterolateral

5 GASTROCNEMIUS (Part of triceps surae) Lateral head-lateral condyle and posterior surface of femur Medial head-popliteal surface of femur above medial condyle Posterior surface of the calcaneus Plantar flexes foot, flexes leg at knee Tibial nerve (81, 82) Leg-posterior

6 SOLEUS (Part of triceps surae) Posterior surface of the tibia (soleal line), upper third of posterior surface of fibula, fibrous arch between tibia and fibula Posterior surface of the calcaneus Plantar flexes foot Tibial nerve (51, 52) Leg-posterior

7 PLANTARIS Lateral supracondylar ridge of femur, oblique popliteal ligament Posterior surface of the calcaneus Plantar flexes foot, flexes leg Tibial nerve (L4, L5, S1) Leg-posterior

8 POPLITEUS Lateral surface of lateral condyle of femur Upper part of posterior surface of tibia Rotates leg medially, flexes leg Tibial nerve (L4, L5, S 1) Note: Stern' contends that this muscle stabilizes the knee by preventing lateral rotation of the tibia during jmedial rotation of the thigh while the foot is planted. *References: Agur, AMR.: Grant's Atlas of Anatomy, 9th ed. Williams and Wilkins, Baltimore, Stern, JT: Essentials of Gross Anatomy, F. A. Davis Company, Philadelphia, Leg-posterior

9 FLEXOR HALLUCIS LONGUS Lower two-thirds of posterior surface of shaft of fibula, posterior intermuscular septum, interosseous membrane Base of distal phalanx of great toe Flexes distal phalanx of great toe, assists in plantar flexing foot, inverts foot Tibial nerve (L5, S1, S2) " : -. ~'i <,.c c Leg-posterior

10 FLEXOR DIGITORUM LONGUS :~. <-. '. Foot-plantar Medial part of posterior surface of tibia Bases of distal phalanges of second, third, fourth, and fifth toes Flexes distal phalanges of lateral four toes, assists in plantar flexing foot, inverts foot Tibial nerve (L5, S1) a.i-=u-posterior

11 TIBIALIS POSTERIOR Foot-plantar Lateral part of posterior surface of tibia, interosseous membrane, proximal half of posterior surface of fibula Tuberosity of navicular bone, cuboid, cuneiforms, second, third, and fourth metatarsals, sustentaculum tali of calcaneus Plantar flexes, inverts foot Tibial nerve (L5, S1) Leg-posterior

12 PERONEUS LONGUS I ~. Foot-plantar Upper two-thirds of lateral surface of fibula Lateral side of medial cuneiform, base of first metatarsal Plantar flexes, everts foot Superficial peroneal nerve (L4, L5, S1) eg-anterolateral

13 ERONEUS BREVIS Lower two-thirds of lateral surface of fibula Lateral side of base of fifth metatarsal bone Everts, plantar flexes foot Superficial peroneal nerve (L4, L5, S1) :i: '.; ~. Leg_anterolateral