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Navarro PTA O.I.A.N
Foot & Ankle
Muscle | Origin | Insertion | Action | Nerve |
---|---|---|---|---|
Extensor Digitorum Longus | Fibula, interosseous membrane and tibia | Distal phalanx of four lesser toes | Extension of four lesser toes and assists in ankle dorsiflexion | Deep fibular nerve (L4, L5, S1) |
Extensor Hallucis Longus | Fibula and interosseous membrane | Distal phalanx of greater toe | Extends first toe IP and MTP joints and assists in ankle inversion and dorsiflexion | Deep fibular nerve (L4, L5, S1) |
Fibularis Longus | Lateral proximal fibula and interosseous membrane | Plantar surface of first cuneiform and metatarsal | Ankle eversion and assists in ankle plantar flexion | Superficial fibular nerve (L4, L5, S1) |
Flexor Digitorum Longus | Posterior tibia | Distal phalanx of four lesser toes | Flexion of four lesser toes and assists in inversion and plantar flexion of the ankle | Tibial nerve (L5, S1, S2) |
Soleus | Posterior tibia and fibula | Posterior calcaneus | Ankle plantar flexion | Tibial nerve (L5, S1, S2) |
Gastrocnemius | Medial and lateral condyles of femur | Posterior calcaneus | Knee flexion and ankle plantar flexion | Tibial nerve (L5, S1, S2) |
Tibialis Anterior | Lateral tibia and interosseous membrane | First cuneiform and first metatarsal | Ankle inversion and dorsiflexion | Deep fibular nerve (L4, L5, S1) |
Tibialis Posterior | Interosseous membrane, adjacent tibia and fibula | Navicular and most tarsals and metatarsals | Assist ankle plantar flexion, ankle inversion | Tibial Nerve (L5, S1) |
Plantaris Muscle | Posterior, lateral tibia | Posterior Calcaneus | Very week assist in knee flexion, ankle inversion | Tibial Nerve (L4, L5, S1) |
Fibularis Brevis | Lateral distal fibula | Tuberosity on base of fifth metatarsal | Ankle eversion; assists in plantar flexion | Superficial fibular nerve (L4, L5, S1) |
Fibularis Tertius Muscle | Distal medial fibula | Tuberosity on base of fifth metatarsal | Assists somewhat in ankle eversion and dorsiflexion | Deep fibular nerve (L4, L5, S1) |
Flexor Hallucis Longus | Posterior fibula and interosseous membrane | Distal phalanx of the great toe | Flexes great toe; assists in inversion and plantar flexion of the ankle | Tibial nerve (L5, S1, S2) |