Lateral and anterior muscles of lower leg Flashcards
Origin of tibialis anterior?
Lateral proximal tibia under the lateral condyle, interosseous membrane
Insertion of tibialis anterior?
Medial surface of the medial cuneiform, base of 1st metatarsal
Action of tibialis anterior?
Dorsiflexion at talocrural joint, inversion at subtalar joint
Innervation of tibialis anterior?
Deep fibular nerve (L4-L5)
Origin of extensor hallucis longus?
Middle third of medial surface of fibula, interosseous membrane
Insertion of extensor hallucis longus?
Base of distal first phalanx of big toe
Action of extensor hallucis longus?
Toe extension of metatarsophalangeal joint 1, dorsiflexion of talocrural joint
Innervation of extensor hallucis longus?
Deep fibular nerve (L5-S1)
Origin of extensor digitorum longus?
Head and anterior margin of fibula, lateral condyle of tibia, interosseous membrane
Insertion of extensor digitorum longus?
Distal and middle phalanges of digits 2-5
Action of extensor digitorum longus?
Dorsiflexion at talocrural joint, eversion at subtalar joint, toe extension at metatarsophalangeal and interphalangeal joints 2-5
Innervation of extensor digitorum longus?
Deep fibular nerve (L5-S1)
Origin of fibularis longus?
Head of fibula, proximal 2/3 of lateral shaft of fibula
Insertion of fibularis longus?
Lower surface of the medial cuneiform bone, inferior base of the first metatarsal
Action of fibularis longus?
Plantarflexion at talocrural joint, eversion at subtalar joint
Innervation of fibularis longus?
Superficial fibular nerve (L5-S1)
Origin of fibularis brevis?
Lateral surface of distal fibula and anterior intermuscular septum
Insertion of fibularis brevis?
Tuberosity of base of 5th metatarsal
Action of fibularis brevis?
Plantarflexion of talocrural joint, eversion at subtalar joint
Innervation of fibularis brevis?
Superficial fibular nerve (L5-S1)
Origin of fibularis tertius?
Anterior surface of distal shaft of fibula, interosseous membrane, anterior intermuscular septum
Insertion of fibularis tertius?
Dorsal surface of base of metatarsal bone 5
Action of fibularis tertius?
Eversion at subtalar joint, dorsiflexion of talocrural joint
Innervation of fibularis tertius?
Deep fibular nerve (L5-S1)