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Leg and Foot Muscles

superficial and deep leg and foot muscles O/I/A

Insertion of Tibialis Anterior Medial side of inferior surface of medial cuneiform & base of 1st metatarsal.
Origin of Tibialis Anterior lateral condyle of tibia, superior 1/2 of lateral surface of tibia
Action of Tibialis Anterior Dorsiflex and inversion, helps to support the medial arch
Extensor Digitorum Longus - Origin lateral condyle of tibia, upper 3/4 of anterior surface of fibula, interosseous membrane where the tendon divides into 4
Extensor Digitorum Longus - Insertion distal and middle phalanges of toes #2-5
Extensor Digitorum Longus - Action dorsiflex, extends toes, everts
Extensor Hallucis Longus - Origin middle 1/2 anterior fibula, interosseus membrane
Extensor Hallucis Longus - Insertion distal phalanx of big toe
Extensor Hallucis Longus - Action dorsiflax, extends big toe, inverts foot
Peroneus Tertius - Origin distal 1/3 of anterior surface of fibula, interosseus membrane
Peroneus Tertius - Insertion dorsal surface of bone & proximal shaft of 5th metatarsal in front of malleolus
Peroneus Tertius - Action dorsiflex, eversion, opposes tibialis anterior
Peroneus Longus - Origin head of fibula, , upper 2/3 of lateral surface of fibula
Peroneus Longus - Insertion lateral side of inferior surface of medial cuneiform & base of 1st metatarsal
Peroneus Longus - Action plantar flexion and eversion of the foot
Peroneus Brevis - Origin inferior 2/3 of lateral fibula passes behind lateral malleolus & passes superior to the peroneal tubercle
Peroneus Brevis - Insertion tuberosity of the base of 5th metatarsal
Peroneus Brevis - Action Eversion of the foot, plantarflex
Gastrocnemius - Origin Lateral Head - Lateral epicoondyle of femur Medial Head - posterior femur proximal to medial epicondyle(back and above)
Gastrocnemius - Insertion Calcaneus via achilles/calcaneal tendon
Gastrocnemius - Action Flexes knee & plantarflexes ankle
Soleus - Origin posterior fibula - head and upper 1/4 tibia - soleal line & medial border
Soleus - Insertion Calcaneus via achilles/calcaneal tendon
Soleus - Action plantarflexes ankle, postural muscle
Plantaris - Origin Lateral side, inferior end of supracondylar line, oblique popliteal ligament
Plantaris - Insertion calcaneus
Plantaris - Action Flexes Knee, plantarflexes ankle
Popliteus - Origin Lateral epicondyle of femur
Popliteus - Insertion Posterior Tibia - superior to soleal line
Popliteus - Action flexes knee, unlocks hperextented knee by medially rotating tibia relative to femur
Flexor Hallucis Longus - Origin posterior surface of fibula inferior 2/3, & interosseus membrane
Flexor Hallucis Longus - Insertion Base of distal phalanx - big toe
Flexor Hallucis Longus - Action flexes big toe, plantar flexion, supports medial arch of foot
Flexor Digitorum Longus - Origin Posterior surface of tibia
Flexor Digitorum Longus - Insertion base of distal phalanx of toes #2-5
Flexor Digitorum Longus - Action flex toes #2-5 plantar flexion, supports longitudinal arch
Tibialis Posterior - Origin interosseous membrane & adjacent tibia/fibula
Tibialis Posterior - Insertion plantar surface of the tuberosity of the navicular, cuboid, cuneiform & bases of metatarsals #2-4, covers entire base of foot
Tibialis Posterior - Action inversion, plantar flexion, maintains arches
Extensor Digitorum Brevis - Origin anterior dorsal surface of calcaneus & inferior extensor retinaculum
Extensor Digitorum Brevis - Insertion proximal phalanx of big toe, blends w tendons of Extensor Digitorum Longus to toes #2-4
Extensor Digitorum Brevis - Action extends toes #1-4, big toe part can be called extensor hallucis brevis
Abductor Hallucis - Origin medial part of calcaneus, plantar aponeurosis, flexor retinaculum
Abductor Hallucis - Insertion medial side of base of proximal phalanx of big toe
Abductor Hallucis - Action abducts and flexes big toe, supports medial longitudinal arch of the foot
Flexor Digitorum Brevis - Origin inferior surface of tubercalcanei, plantar aponeurosis, divides into 4 tendons
Flexor Digitorum Brevis - Insertion middle phalanges of toes 2-5 both medial and lateral sides (superficial to tendon of flexor digitorum longus)
Flexor Digitorum Brevis - Action flexes toes supports medial and lateral arches
Abductor Digiti Minimi - Origin lateral side of plantar surface of calcaneus and aponeurosis
Abductor Digiti Minimi - Insertion lateral side of base of proximal phalanx of little toe
Abductor Digiti Minimi - Action abducts and flexes little toe, supports lateral longitudinal arch
Created by: jrossington