Muscles of The Leg Flashcards
Tibialis Anterior
O: Lateral condyle and proximal 2/3 of the lateral
surface of tibia and interosseous membrane
I: Medial cuneiform and the base of the first metatarsal
A: Dorsiflexion, inversion
Inv: Deep peroneal
Extensor Digitorum Longus
O: Lateral condyle of tibia and medial surface of fibula
I: By four tendons that attach to the proximal base middle and distal phalanges via the dorsal digital
expansion
A: Toe extension, Ankle dorsiflexion, eversion
Inv: Deep peroneal
Extensor Hallucis Longus
O: Medial surface of the fibula and adjacent interosseous membrane
I: Distal phalanx of great toe
A: 1st toe extension, Ankle dorsiflexion, inversion
Inv: Deep peroneal
Peroneus Tertius
O: Distal one third of the medial surface of the fibula
and adjacent interosseous membrane
I: Base of 5th metatarsal
A: Ankle dorsiflexion, eversion
Inv: Deep peroneal
Peroneus Longus
O: Lateral condyle of tibia; head, proximal two thirds of the lateral surface of the fibula
I: Lateral surface of the medial cuneiform and lateral side of the base of first metatarsal bone
A: Plantar flexion, eversion
Inv: Superficial peroneal
Peroneus Brevis
O: Lateral surface of fibula
I: Styloid process of the fifth metatarsal
A: Plantar flexion, eversion
Inv: Superficial peroneal
Gastrocnemius
O: Posterior aspect of the lateral and medial femoral
condyle
I: Calcaneal tuberosity via the Achilles tendon
A: Plantar flexion, Knee flexion
Inv: Tibial
Soleus
O: Posterior surface of the
fibula head and proximal
1/3 of its shaft and from the
posterior side of the tibia
I: Calcaneal tuberosity via the Achilles
tendon
A: Plantar flexion
Inv: Tibial
Plantaris
O: Inferior part of lateral supracondylar line of the
femur
I: Joins the medial aspect of the Achilles tendon to insert on the calcaneal tuberosity
A: Slight Knee flexion, Plantar flexion
Inv: Tibial
Popliteus
O: Lateral condyle of femur
I: Posterior side of tibia
A: Knee flexion and internal rotation
Inv: Tibial
Flexor Digitorum Longus
O: Posterior surface of tibia
I: By four separate tendons to the base of the distal phalanx of the four lesser toes
A: 2-5 toes flexion, Plantar flexion, Inversion
Inv: Tibial
Flexor Hallucis Longus
O: Posterior surface of fibula
I: Plantar surface of the base of the distal phalanx of the great toe
A: Flexion of great toe, Plantar flexion, Inversion
Inv: Tibial
Tibialis Posterior
O: Posterior surface of the tibia and fibula & adjacent
interosseous membrane
I: Tuberosity of navicular and all tarsals except talus
A: Plantar flexion, Inversion
Inv: Tibial
