muscles of the leg

Anterior leg — Tibialis anterior (blue)

Origin: Proximal tibia;

Insertion: Medial foot;

Main action(s): Ankle dorsiflexion, inversion;

Innervation: Deep fibular n.

Anterior leg — Extensor digitorum longus (green)

Origin: Proximal tibia/fibula;

Insertion: Digits 2–5;

Main action(s): Ankle dorsiflexion, digit extension;

Innervation: Deep fibular n.

Anterior leg — Extensor hallucis longus

Origin: Proximal fibula;

Insertion: Digit 1;

Main action(s): Ankle dorsiflexion, digit 1 extension;

Innervation: Deep fibular n.

Anterior leg — Fibularis tertius

Origin: Distal fibula;

Insertion: Lateral foot;

Main action(s): Ankle dorsiflexion, eversion;

Innervation: Deep fibular n.

Lateral leg — Fibularis brevis (green)

Origin: Distal fibula;

Insertion: Lateral metatarsal;

Main action(s): Ankle plantarflexion, eversion; Innervation:

Superficial fibular n.

Lateral leg — Fibularis longus

Origin: Proximal fibula;

Insertion: Medial foot;

Main action(s): Ankle plantarflexion, eversion;

Innervation: Superficial fibular n.

Deep posterior leg — Tibialis posterior (green)

Origin: Interosseous membrane;

Insertion: Medial foot;

Main action(s): Ankle plantarflexion, inversion;

Innervation: Tibial n.

Deep posterior leg — flexor hallicus longus (purple)

Origin: Mid-fibula;

Insertion: Digit 1;

Main action(s): Ankle plantarflexion, inversion, digit 1 flexion;

Innervation: Tibial n.

Deep posterior leg — Flexor digitorum longus (blue)

Origin: Proximal tibia;

Insertion: Digits 2–5;

Main action(s): Ankle plantarflexion, inversion, digit flexion;

Innervation: Tibial n.

Deep posterior leg — Popliteus (orange) 

Origin: Lateral femoral epicondyle;

Insertion: Posterior tibia;

Main action(s): Knee rotation (unlocks knee);

Innervation: Tibial n.

Superficial posterior leg — Plantaris

Origin: Posterior femur; I

nsertion: Calcaneus;

Main action(s): Ankle plantarflexion, proprioception;

Innervation: Tibial n.

Superficial posterior leg — Gastrocnemius

Origin: Posterior femur;

Insertion: Calcaneus (via calcaneal tendon);

Main action(s): Ankle plantarflexion, knee flexion;

Innervation: Tibial n.

blue

Superficial posterior leg — Soleus (green) 

Origin: Posterior tibia & fibula; Insertion: Calcaneus (via calcaneal tendon); Main action(s): Ankle plantarflexion; Innervation: Tibial n.