Muscles of the Leg Flashcards
What are the compartment of the leg, and how many muscles are in each?
Anterior (4)
Lateral (2)
Posterior (3) Superficial
Posterior (4) Deep
What are the origins of tibialis anterior?
Tibia and interosseous membrane.
What are the insertions of tibialis anterior?
Medial cuneiform and base of metatarsal 1.
What are the actions of tibialis anterior?
Dorsiflexion of the foot at the ankle joint; inversion of foot.
What innervates tibialis anterior?
Deep fibular nerve.
What are the origins of extensor digitorum longus?
Fibula and lateral tibial condyle.
What is the insertion of extensor digitorum longus?
Via dorsal digital expansions into digits 2-5.
What are the actions of extensor digitorum longus?
Extension of lateral digits 2-5 and dorsiflexion of foot.
What innervates extensor digitorum longus?
Deep fibular nerve.
What are the origins of extensor hallucis longus?
Fibula and interosseous membrane.
What is the insertion of extensor hallucis longus?
Distal phalanx of great toe.
What are the actions of extensor hallucis longus?
Extension of great toe and dorsiflexion of foot.
What innervates extensor hallucis longus?
Deep fibular nerve.
What is the origin of fibularis tertius?
Distal part of fibula.
What is the insertion of fibularis tertius?
Base of metatarsal 5.
What are the actions of fibularis tertius?
Dorsiflexion and eversion of foot.
What innervates fibularis tertius?
Deep fibular nerve.
What is the origin of fibularis longus?
Upper surface of fibula.
What is the insertion of fibularis longus?
Medial cuneiform and base of metatarsal 1.
What are the actions of fibularis longus?
Eversion and plantarflexion of foot.
What innervates fibularis longus?
Superficial fibular nerve.
What is the origin of fibularis brevis?
Lower surface of fibula.
What is the insertion of fibularis brevis?
Base of metatarsal 5.
What are the actions of fibularis brevis?
Eversion and plantarflexion of foot.
What innervates fibularis brevis?
Superficial fibular nerve.
What innervates flexor hallucis longus?
Tibial nerve.
What is the origin of flexor digitorum longus?
Tibia.
What is the insertion of flexor digitorum longus?
Distal phalanges 2-5.
What are the actions of flexor digitorum longus.
Flexes digits 2-5.
What innervates flexor digitorum longus?
Tibial nerve.
What are the origins of tibialis posterior?
Interosseous membrane, tibia, and fibula.
What are the insertions of tibialis posterior?
Navicular, all cuneiform bones, and metatarsal 2-4.
What are the actions of tibialis posterior?
Inversion and plantarflexion of the foot.
What innervates tibialis posterior?
Tibial nerve.
