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Ankle/Foot Muscles
origins, insertions, actions, innervations, segments
Muscle | Orgin | Insertion | Action | Innervation | Segment |
---|---|---|---|---|---|
extensor hallucis longus | fibula and interosseous membrane | distal phalanx of great toe | extends 1st toe (IP, and MTP joints) and assists in ankle inversion and dorsiflexion | deep fibular nerve (peroneus) | L4, L5, S1 |
extensor digitorum longus | fibula, interosseous membrane, and tibia | distal phalanx of 4 lesser toes | extension of 4 lesser toes and assists in ankle dorsiflexion | deep fibular nerve (peroneus) | L4, L5, S1 |
tibialis posterior | interosseous membrane , and adjacent tibia and fibula | navicular and most tarsals and metatarsals | ankle inversion and assist in plantar flexion | tibial nerve | L5, S1 |
flexor digitorum longus | posterior tibia | distal phalanx of 4 lesser toes | flexion of 4 lesser toes and assist in inversion and plantar flexion of ankle | tibial nerve | L5, S1 |
flexor hallucis longus | posterior fibula and interosseous membrane | distal phalanx of great toe | great toe flexion and assist in inversion and plantar flexion of ankle | tibial nerve | L5, S1, S2 |
fibularis longus (peroneus) | lateral proximal fibula and interosseous membrane | plantar surface of 1st cuneiform and metatarsal | ankle eversion and assists in ankle plantar flexion | superficial fibular nerve (peroneus) | L4, L5, S1 |
fibularis brevis (peroneus) | lateral distal fibula | tuberosity on base of 5th metatarsal | ankle eversion and assists in ankle plantar flexion | superficial fibular nerve (peroneus) | L4, L5, S1 |
Fibularis Tertius (peroneus) | distal medial fibula | tuberosity on base of 5th metatarsal | assists somewhat in ankle eversion and dorsiflexion | deep fibular nerve (peroneus) | L4, L5, S1 |
gastrocnemius | medial and lateral condyles of femur | posterior calcaneus | knee flexion and ankle plantar flexion | tibial nerve | S1, S2 |
soleus | posterior tibia and fibula | posterior calcaneus | ankle plantar flexion | tibial nerve | S1, S2 |
plantaris | posterior lateral condyle of femur | posterior calcaneus | very weak assist in knee flexion and ankle plantar flexion (unlock knee) | tibial nerve | L4, L5, S1 |
tibialis anterior | lateral tibia and interosseous membrane | 1st cuneiform and 1st metatarsal | ankle inversion and dorsiflexion | deep fibular nerve (peroneus) | L4, L5, S1 |