Muscles acting on the ankle and foot

What muscle is this

Fibularis tertius

What does the fibularis tertius do

Dorsiflexes and everts foot during walking

Where does the fibularis tertius originate

Medial surface of lower one third of fibula; interosseous membrane

Where does the fibularis tertius insert

Metatarsal V

What muscle is this

Extensor digitorum longus

What does the extensor digitorum longus do

Extends toes

Where does the extensor digitorum longus originate

Lateral condyle of tibia; shaft of fibula; interosseous membrane

Where does the extensor digitorum longus insert

Middle and distal phalanges II-V

What muscle is this

Extensor hallucis longus

What does the extensor hallucis longus do

Extends big toe

Where does the extensor hallucis longus originate

Anterior surface of middle of fibula, interosseous membrane

Where does the extensor hallucis longus insert

Distal phalanx I

What muscle is this

Tibialis anterior

What does the tibialis anterior do

Dorsiflexes and inverts foot

Where does the tibialis anterior originate

Lateral condyle and lateral margin of proximal half of tibia; interosseous membrane

Where does the tibialis anterior insert

Medial cuneiform, metatarsal I

What muscle is this

Gastrocnemius

What does the gastrocnemius do

Plantar flexes foot

Where does the gastrocnemius originate

Condyles, popliteal surface, and lateral supracondylar line of femur; capsule of knee joint

Where does the gastrocnemius insert

Calcaneal tuberosity

What muscle is this

Soleus

What does the soleus do

Plantar flexes foot

Where does the soleus originate

Posterior surface of head and proximal one fourth of tibia; middle one third of tibia; interosseous membrane

Where does the soleus insert

Calcaneal tuberosity

What muscle is this

Flexor digitorum longus

What does the flexor digitorum longus do

Flexes toes II-V

Where does the flexor digitorum originate

Posterior surface of tibial shaft

Where does the flexor digitorum longus insert

Distal phalanges II-V

What muscle is this

Flexor hallucis longus

What does the flexor hallucis longus do

Flexes big toe

Where does the flexor hallucis longus originate

Distal two thirds of fibula and interosseous membrane

Where does the flexor hallucis longus insert

Distal phalanx I

What muscle is this

Tibialis posterior

What does the tibialis posterior do

Inverts foot

Where does the tibialis posterior originate

Posterior surface of proximal half of tibia, fibula, and interosseous membrane

Where does the tibialis posterior insert

Navicular, medial cuneiform, metatarsals II-IV

What muscle is this

Fibularis brevis

What does the fibularis brevis do

May evert foot and limit inversion

Where does the fibularis brevis originate

Lateral surface of distal two thirds of fibula

Where does the fibularis brevis insert

Base of metatarsal V

What muscle is this

Fibularis longus

What does the fibularis longus do

Everts and plantar flexes foot

Where does the fibularis longus originate

Head and lateral surface of proximal two thirds of fibula

Where does the fibularis longus insert

Medial cuneiform, metatarsal I