Muscles of the leg Flashcards
what muscles are in the anterior compartment?
Tibialis anterior
Extensor hallucis longus
Extensor digitorum longus
Fibularis tertius
What innervates the anterior compartment?
Deep fibular nerve
Where does tibialis anterior originate?
Tibia - lateral surface, adjacent to interosseous membrane
Where does tibialis anterior insert?
Medial cuneiform - medial and inferior surfaces
adjacent surface on base of metatarsal 1
Which muscle dorsiflexes the foot and causes inversion?
Tibialis anterior
What is the function of tibialis anterior?
dorsiflexion and inversion of foot
and dynamic support of medial arch
Which muscle originates from the middle half of the medial surface of the fibula? (and adjacent interosseous membrane)
Extensor hallucis longus
Where does extensor hallucis longus insert?
Dorsal surface of base of distal phalanx of great toe
Which nerve innervates extensor hallucis longus?
Deep fibular nerve
which muscle is responsible for dorsiflexion of foot and extension of great toe?
Extensor hallucis longus
Where does extensor digitorum longus originate?
Proximal half of medial surface of fibula
Where does extensor digitorum longus insert?
the bases of distal and middle phalanges of lateral four toes
what innervates extensor digitorum longus?
Deep fibular nerve
What is the function of Extensor digitorum longus?
dorsiflexion of foot and extension of lateral four toes
What muscle originates from the distal part of the medial surface of fibula?
fibulas tertius
Where does fibulas tertius insert?
Base of metatarsal 5 - dorsomedial surface
What innervates fibulas tertius?
Deep fibular nerve
What is the function of Fibularis tertius?
dorsiflexion and eversion of foot
what are the muscles of the lateral compartment?
Fibulas longus and fibulas brevis
Where does fibulas longus originate?
lateral surface of fibular and head of fibula
where does fibularis longus insert?
Medial cuneiform and base of metatarsal 1
What is the innervation of the lateral compartment?
Superficial fibular nerve L5,S1,S2
Which muscle cause eversion and plantar flexion of the foot? (and support arches)
Fibulas longus
What is the function of fibularis brevis?
Eversion of foot
Where is the origin of fibularis brevis?
shaft of fibula - lower two thirds of lateral surface
Where does fibularis brevis insert?
lateral tubercle on base of metatarsal 5
