muscles of the leg

Anterior leg — Tibialis anterior

Origin: Proximal tibia;

Insertion: Medial foot;

Main action(s): Ankle dorsiflexion, inversion;

Innervation: Deep fibular n.

Anterior leg — Extensor digitorum longus

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

Origin: Distal fibula; Insertion: Lateral foot; 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

Origin: Interosseous membrane; Insertion: Medial foot; Main action(s): Ankle plantarflexion, inversion; Innervation: Tibial n.

Deep posterior leg — Flexor hallucis longus

Origin: Mid-fibula; Insertion: Digit 1; Main action(s): Ankle plantarflexion, inversion, digit 1 flexion; Innervation: Tibial n.

Deep posterior leg — Flexor digitorum longus

Origin: Proximal tibia; Insertion: Digits 2–5; Main action(s): Ankle plantarflexion, inversion, digit flexion; Innervation: Tibial n.

Deep posterior leg — Popliteus

Origin: Lateral femoral epicondyle; Insertion: Posterior tibia; Main action(s): Knee rotation (unlocks knee); Innervation: Tibial n.

Superficial posterior leg — Plantaris

Origin: Posterior femur; Insertion: 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.

Superficial posterior leg — Soleus

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