Ankle And Foot Muscles Flashcards
Gastrocnemius
O: medial and lateral condyles of femur
I: posterior calcaneus
A: knee flexion and ankle plantar flexion
N: tibial nerve (S1, S2)
Soleus
O: posterior tibia and fibula
I: posterior calcaneus
A: ankle plantar flexion
N: tibial nerve (S1, S2)
Tibialis Posterior
O: interosseous membrane, adjacent tibia and fibula
I: navicular and most tarsals and metatarsals
A: ankle inversion; assists in plantar flexion
N: tibial nerve (L5, S1)
Flexor Hallucis Longus
O: posterior fibula and interosseous membrane
I: distal phalanx of the great toe
A: flexes great toe; assists in inversion and plantar flexion of the ankle
N: tibial nerve (L5, S1, S2)
Flexor Digitorum Longus
O: posterior tibia
I: distal phalanx of four lesser toes
A: flexes the four lesser toes; assists in ankle inversion and plantar flexion of the ankle
N: tibial nerve (L5, S1)
Tibialis Anterior
O: lateral tibia and interosseous membrane
I: first cuneiform and first metatarsal
A: ankle inversion and dorsiflexion
N: deep fibular nerve (L4, L5, S1)
Extensor Hallucis Longus
O: fibula and interosseous membrane
I: distal phalanx of great toe
A: extends first toe IP and MTP joints; assists in ankle inversion and dorsiflexion
N: deep fibular nerve (L4, L5, S1)
Extensor Digitorum Longus
O: fibula, interosseous membrane, tibia
I: distal phalanx of four lesser toes
A: extends four lesser toes, assists in ankle dorsiflexion
N: deep fibular nerve (L4, L5, S1)
Fibularis Longus
O: lateral proximal fibula and interosseous membrane
I: plantar surface of first cuneiform and metatarsal
A: ankle eversion; assists in ankle plantar flexion
N: superficial fibular nerve (L4, L5, S1)
Fibularis Brevis
O: lateral distal fibula
I: tuberosity on base of fifth metatarsal
A: ankle eversion; assists in plantarflexion
N: superficial fibular nerve (L4, L5, S1)
