Muscles of foot and ankle Origin Insertion Action PDF

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POSTERIOR MUSCLES

ORIGIN

INSERTION

ACTION

GASTROCNEMIUS

Medial headposterior part of medial femoral condyle

Posterior surface of calcaneus

Plantarflexes ankle, flexes knee

Lateral headlateral surface of lateral femoral condyle SOLEUS

Soleal line and middle third of medial border of tibia, posterior surface of head and upper quarter of fibula, fibrous arch between tibia and fibula

Posterior surface of calcaneus

Plantarflexes ankle

FLEXOR DIGITORUM LONGUS

Medial part of posterior surface of tibia, deep transverse fascia

Plantar aspect of base of distal phalanges of second to fifth toes

Flexes lateral four toes, plantarflexes ankle

FLEXOR HALLUCIS LONGUS

Lower 2/3 of posterior surface of fibula, interosseous membrane, intermuscular septum

Plantar surface of base of distal phalanx of great toe

Flexes great toe, plantarflexes ankle

TIBIALIS POSTERIOR

Lateral aspect of posterior surface of tibia below soleal line, interosseous membrane,

Tuberosity of navicular

Plantarflexes and inverts ankle

upper half of posterior surface of fibula,

PLANTARIS

Medial cuneiform Sustentaculum tali Intermediate cuneiform

deep transverse fascia

Base of second to fourth metatarsals

Lateral supracondyle ridge,

Tendo calcaneus

Plantarflexes ankle

oblique popliteal ligament

LATERAL MUSCLE PERONEUS LONGUS

PERONEUS BREVIS

ORIGIN Lateral tibial condyle, upper 2/3 of lateral surface of fibula Intermuscular septa Lower 2/3 of lateral surface of fibula, intermuscular septa

Flexes ankle

INSERTION Lateral side of base of first metatarsal, medial cuneiform

ACTION Everts and plantarflexes ankle

Lateral side of base of fifth metatarsal

Everts and plantarflexes ankle

ANTERIOR MUSCLES

ORIGIN

INSERTION

ACTION

TIBIALIS ANTERIOR

Lateral tibial condyle and upper 2/3 of lateral surface of tibia, interosseous membrane

Medial and inferior surface of medial cuneiform, base of first metatarsal

Dorsiflexes and inverts ankle

EXTENSOR DIGITORIUM LONGUS

Upper ¾ of medial surface of fibula, interosseous membrane, lateral tibial condyle

Middle and distal phalanges of four lateral toes

Extends lateral four toes

EXTENSOR HALLUCIS LONGUS

Middle half of medial surface of fibula, interosseous membrane

PERONEUS TERTIUS

Distal third of

Base of distal phalanx of great toe

Dorsiflexor of ankle Extends great toe Ankle dorsiflexor

Medial aspect of

Everts and

medial surface of fibula, interosseous membrane, intermuscular septum

base of fifth metatarsal

dorsiflexes ankle...