knee muscles Flashcards
tibialis anterior
O: lateral condyle and proximal 2/3 of lateral surface of tibia and interosseous membrane
I: medial cuneiform and base of first metatarsal
A: DF, inversion
I: deep peroneal
extensor digitorum longus
O: lateral condyle of tibia and medial surface of fibula
I: by 4 tendons that attach to the proximal base middle and distal phalanges via dorsal digital expansion
A: toe extension, ankle DF, eversion
I: deep peroneal
extensor hallucis longus
O: medial surface of fibula and adjacent interosseus membrane
I: distal phalanx of great toe
A: 1st toe extension, ankle DF, inversion
I: deep peroneal
peroneus tertius
O: distal 1/3 of medial surface of fibula and adjacent interosseus membrane
I: base of 5th metatarsal
A: ankle DF, eversion
I: deep peroneal
peroneus longus
O: lateral condyle of tibia; head, proximal 2/3 of lateral surface of fibula
I: lateral surface of medial cuneiform and lateral side of base of first metatarsal bone
A: PF, eversion
I: superficial peroneal
peroneus brevis
O: lateral surface of fibula
I: styloid process of 5th metatarsal
A: PF, eversion
I: superficial peroneal
gastrocnemius
O: posterior aspect of lateral and medial femoral condyle
I: calcaneal tuberosity via achilles tendon
A: PF, knee flexion
I: tibial
soleus
O: post surface of fibular head and prox 1/3 of its shaft and from post side of tibia
I: calcaneal tuberosity via achilles tendon
A: PF
I: tibial
plantaris
O: inferior part of lateral supracondylar line of femur
I: joins medial aspect of achilles tendon to insert on the calcaneal tuberosity
A:slight knee flexion, PF
I: tibial
popliteus
O: lateral condyle of femur
I: posterior side of tibia
A: knee flexion and internal rotation
I: tibial
flexor digitorum longus
O: posterior surface of tibia
I: by 4 separate tendons to base of distal phalanx of 4 lesser toes
A: 2-5 toes flexion, PF, inversion
I: tibial
flexor hallucis longus
O: posterior surface of fibula
I: plantar surface of base of distal phalanx of great toe
A: great toe flexion, PF, inversion
I: tibial
tibialis posterior
O: posterior surface of tibia and fibula and adjacent interosseous membrane
I: tuberosity of navicular and all tarsals except talus
A: PF, inversion
I: tibial
