Muscles of anterior and lateral compartments of the leg Flashcards
Insertion of tibialis anterior
medial and inferior surface of medial cuneiform and base of 1st metatarsal
Tibialis Anterior origin
Lateral condyle and superior 2/3 of lateral surface of tibia and interosseous membrane
innervation of Tibialis anterior
Deep fibular nerve (L4, L5)
Action of Tibialis Anterior
Dorsiflexes ankles
inverts foot
supports medial longitudinal arch of foot
Extensor Hallucis longus origin
Middle part of anterior surface of fibula and interosseous
Extensor hallucis longus insertion
Dorsal aspect of base of distal phalanx of great toe
Innervation of extensor hallucis longus
Deep fibular nerve (l5, S1)
Action of Extensor hallucis longus
extends great toe
dorsiflexes ankle
Extensor digitorum longus origin
Lateral condyle of tibia
superior 2/3 of anterior surface of fibula and interosseous membrane
Insertion of extensor digitorum longus
Middle and distal phalanges of lateral 4 digit
Innervation of extensor digitorum longus
Deep fibular nerve (l5,S1)
Action of Extensor Digitorum longus
Dorsiflex ankle
Extends lateral 4 digits
Fibularis tertius origin
Inferior 1/3 of anterior surface of fibula and interosseous membrane
Fibularis tertius insertion
Dorsum of base of 5th metatarsal
Fibularis tertius innervation
deep fibular nerve (L5,S1)
Fibularis tertius action
dorsiflex ankle
aids in eversion of foot
Fibularis longus Origin
Head and superior 2/3 of lateral surface of fibula
Insertion of Fibularis longus
Base of 1st metatarsal and medial cuneiform
Innervation of Fibularis longus
superficial fibular nerve (L5, S1, S2)
Action of fibularis longus
Evert foot
weakly plantarflex ankle
supports transverse arch of foot
Fibularis brevis origin
Middle part of lateral surface of fibula
insertion of fibularis breves
Dorsal surface of tuberosity of base of 5th metatarsal
Innervation of Fibularis brevis
Superficial fibular nerve (l5,S1,S2)
Action of Fibular brevis
Everts foot
weak plantarflex of ankle
