Muscles acting on the Foot and Ankle (O/I/A) Flashcards
Fibularis longus
O: Head of lateral fibula
I: First metatarsal and medial cuneiform
A: Flexes and everts foot
Fibularis brevis
O: Distal fibula shaft
I: Fifth metatarsal
A: Flex and evert foot
Tibialis anterior
O: Lateral condyle and upper 2/3 of tibial shaft
I: First metatarsal
A: Dorsiflexion
Extensor digitorum longus
O: Lateral condyle of tibia, 3/4 of fibular
I: Middle and distal phalanges
A: Toe extension
Fibularis tertius
O: Anterior fibula
I: 5th metatarsal
A: Dorsiflexes and everts foot
Extensor hallucis longus
O: Fibula shaft
I: Distal phalanx of great toe
A: Extend great toes
Gastrocnemius
O: Condyles of femur
I: Calcaneus
A: Flexes foot
Soleus
O: Superior tibia and fibula
I: Calcaneus
A: Flexes foot
Popliteus
O: Lateral condyle of femur
I: Proximal tibia
A: Unlocks knee from full extension
Tibialis posterior
O: Superior tibia and fibula
I: Tarsals and metatarsals
A: Foot inversion
Flexor digitorum longus
O: Posterior tibia
I: Distal phalanges
A: Flex and invert foot, flexes toes
Flexor hallucis longus
O: Middle shaft of fibula
I: Phalanx of great toe
A: Flex and invert foot, flexes toes
