Leg and Dorsal foot muscles Flashcards
Tibialis Anterior
O: lateral surface of most tibia and IO membrane
I: medial cuneiform and base of first metatarsal
A: dorsiflexes and inverts foot
N: deep fibular n
Extensor digitorum longus
O: most of th anterior fibula and IO membrane
I: middle and distal phalanges of four lesser toes
A: extends toes, dorsiflex foot
N: deep fibular n.
Fibularis (peroneus) tertius
O: distal anterior surface of fibula (EDL continuation)
I:base of 5th MT
A: aids in eversion and dorsiflexion
N: deep fibular
Extensor hallucis longus
O: mid fibula, deep to TA and EDL
I: base of phalanx of great doe, Hallux
A: extends great toe, dorsiflexes foot
N: deep fibular
Extensor digitorum brevis
O: dorsal surface of calcaneus
I: base of proximal phalanx of great toe and proximal phalanges of toes 2,3,4 via tendons of EDL
A: extends toes 1-4
N: deep fibular n.
Fibularis (peroneus) longus
O: upper lateral 2/3 of fibula
I: 1st MT and medial cuneiform
A: everts and plantar flexes the foot
N: superficial fibular n.
Fibularis brevis
O: distal lateral fibula
I: base of 5th MT
A: everts and plantar flexes foot
N: superficial fibular n.
Gastrocnemius
O: posterior lateral and meidal femoral condyles
I: calcaneus in common with soleus and plantaris muscles
A: plantar flex the foot, flexes the leg
N: tibial nerve
Soleus
O: posterior surface of head and proximal shaft of fibula, soleal line on upper tibia
I: calcaneus with gasctroc and plantaris
A: plantar flexes the foot
N: tibial n
Plantaris
O: posterior lateral femoral condyle
I: calcaneus with gastroc and soleus
a: weak plantar flexion and flexes leg
N: tibial n.
popliteus
O: Lateral condyle of femur
I: proximal tibia above soleal line
A: F and MR leg, when foot is fixed, latarally rotates femur to unlock knee jt as leg F proceeds
N: tibial n.
Flexor digitorum longus
O: posterior, mid tibia
I: base of distal phalanx of 4 small toes
A: F 4 small toes, plantar flex foot
N: tibial
Flexor hallucis longus
O: distal posterior tibial and IO
I: base of distal phalanx of hallux
A: flexes hallux, plantar flexes foot
N:Tibial n.
Tibialis posterior
O: posterior, upper tibia, fibula and IO
I: Platar surface of MT 2-4, navicular, medial cuneiform, all other tarsals except talus
A: inverts and plantar flexes foot
N: tibial
