Muscles of the Leg

tibialis anterior - origin

lateral condyle and proximal 2/3 of the lateral surface of the tibia and interosseous membrane

tibialis anterior - insertion

medial cuneiform and the base of the first metacarpal

tibialis anterior - action

dorsiflexion

inversion

tibialis anterior - innervation

deep peroneal

extensor digitorum longus - origin

lateral condyle of the tibia and medial surface of the tibia

extensor digitorum longus - insertion

by 4 tendons that attach to the proximal base middle and distal phalanges via the dorsal digital expansion

extensor digitorum longus - action

toe extension, ankle dorsiflexion, eversion

extensor digitorum longus - innervation

deep peroneal

extensor hallucis longus - origin

medial surface of the fibula and adjacent interosseous membrane

extensor hallucis longus - insertion

distal phalanx of great toe

extensor hallucis longus - action

1st toe extension

ankle dorsiflexion

inversion

extensor hallucis longus - action

deep peroneal

peroneus tertius - origin

distal one third of the medial surface of the fibula and adjacent interosseous membrane

peroneus tertius - insertion

base of 5th metatarsal

peroneus tertius - action

ankle dorsiflexion

eversion

peroneus tertius - innervation

deep peroneal

peroneus longus - origin

lateral condyle of tibia, head, proximal 2/3 of the lateral surface of the fibula

peroneus longus - insertion

lateral surface of the medial cuneiform and lateral side of the base of first metatarsal

peroneus longus - action

plantarflexion

eversion

peroneus longus - innervation

superficial peroneal

peroneus brevis - origin

lateral surface of fibula

peroneus brevis - insertion

styloid process of the 5th metatarsal

peroneus brevis - action

plantarflexion

eversion

peroneus brevis - innervation

superficial peroneal

gastrocnemius - origin

posterior aspect of the lateral and medial femoral condyle

gastrocnemius - insertion

calcaneal tuberosity via the achilles tendon

gastrocnemius - action

plantarflexion

knee flexion

soleus - origin

posterior surface of the fibular head and proximal 1/3 of its shaft from the posterior side of the tibia

soleus - insertion

calcaneal tuberosity via the achilles tendon

soleus - action

plantar flexion

soleus - innervation

tibial

plantaris - origin

inferior part of the lateral supracondylar line of the femur

plantaris - insertion

joins the medial aspect of the achilles tendon to insert on the calcaneal tuberosity

plantaris - action

slight knee flexion

plantarflexion

plantaris - innervation

tibial

popliteus - origin

lateral condyle of femur

popliteus - insertion

posterior side of tibia

popliteus - action

knee flexion and internal rotation

popliteus - innervation

tibial

flexor digitorum longus - origin

posterior surface of tibia

flexor digitorum longus - insertion

by 4 separate tendons to the base of the distal phalanx of the four lesser toes

flexor digitorum longus - action

2-5 toes flexion, plantarflexion, inversion

flexor digitorum longus - innervation

tibial

flexor hallucis longus - origin

posterior surface of fibula

flexor hallucis longus - insertion

plantar surface of the base of the distal phalanx of the great toe

flexor hallucis longus - action

flexion of great toe

plantar flexion

inversion

flexor hallucis longus - innervation

tibial

tibialis posterior - origin

posterior surface of the tibia and fibula and adjacent interosseous membrane

tibialis posterior - insertion

tuberosity of navicular and all tarsals except talus

tibialis posterior - action

plantarflexion

inversion

tibialis posterior - innervation

tibial