Extrinsic and Intrinsic Muscles That Move Foot and Toes

Anterior Compartment

Tibialis anterior, extensor digitorum longus, extensor hallucis longus, fibularis tertius

Tibialis anterior

O: lat condyle and shaft tibia
I : base 1 metatarsal and medial cuneiform
A: dorsiflex ankle, foot inversion

Extensor digitorum longus

O: lat condyle tibia and ant fibula
I : sup surface of phalanges 2-5
A: dorsiflex ankle, toe 2-5 ext

Extensor hallucis longus

O: ant fibula
I : distal phalanx great toe
A: dorsiflex ankle, ext great toe

Fibularis tertius

Posterior Compartment (superficial)

Gastrocnemius, soleus, plantaris

Gastrocnemius

O: femoral condyles
I : calcaneus via calcaneal tendon
A: plantar flex ankle, flex knee

Soleus

O: head + shaft of fibula bit of tibula
I : calcaneus via calcaneal tendon
A: plantar flex ankle, posture standing

Plantaris

O: lat supracondylar ridge
I : pos calcaneus
A: plantar flex ankle, flex knee

Posterior Compartment (deep)

Tibialis posterior, flexor digitorum longus, flexor hallucis longus, popliteus

Tibialis posterior

Flexor digitorum longus

Flexor digitorum longus, flexor hallucis longus

Popliteus

O: lat condyle of femur
I : prox pos tibia
A: knee flex, med rot of tibia (lat rot femur)

Lateral compartment

Fibularis longus and brevis

Fibularis longus

Fibularis brevis

First layer

Flexor digitorum brevis
Abductor digiti minimi + Abductor hallucis

Second layer

Quadratus plantae - calcaneus inserts into flex digitorum longus tendons
Lumbricals - og from flex digitorum longus tendons

Third layer

Flexor digiti minimi + Flexor hallucis brevis 11

Adductor hallucis 7

Fourth layer

PAD DAB

Intrinsics dorsal side

Extensor digitorum brevis

Extensor hallucis brevis