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Lower Extremity
muscles of the lower extremity
15
Anatomy
Graduate
03/18/2009

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Cards

Term
Gastrocnemius
Definition
O: posterior, medial aspect of medial and lateral femoral condyles

I: calcaneus via the Achilles tendon

N: tibial nerve

A: plantar flexion of the foot, flexion of the leg
Term
Soleus
Definition
O: posterior surface of head and proximal 1/3 of the shaft of the fibula; soleal line an middle 1/3 of the postero-medial border of the tibia

I: calcaneus via Achilles tendon

N: tibial nerve

A: plantar flexion of the foot
Term
Tibialis posterior
Definition
posterior surface of the tibia, fibula and interosseus membrane

I: navicular tuberosity and all tarsal bones except talus, 2nd, 3rd and 4th metatarsals

A: plantar flexion and inversion of the foot; supports the arch
Term
Flexor Digitorum Longus
Definition
O: posterior surface of the tibia

I: plantar surface of the istal phalanx of lesser toes

N: tibial nerve

A: plantar flexion of the lesser toes; inversion of the foot
Term
Flexor Hallucis Longus
Definition
O: distal 2/3 of posterior fibula and interosseus membrane

I: plantar surface of the distal phalanx of the great toe

N: tibial nerve

A: Plantar flexion of the great toe; inversion of the foot
Term
Tibialis Anterior
Definition
O: lateral condyle of the tibia; proximal 2/3 of the fibula; interosseus membrane

I: plantar surface of the base of the 1st metatarsal; medial plantar surface of the 1st cunieform

N: deep peroneal nerve

A: dorsiflexion and inversion of the foot
Term
Extensor Hallucis Longus
Definition
O: middle 1/2 anterior fibula; interosseus membrane

I: Dorsum of the base of the distal phalanx of the great toe

N: deep peroneal nerve

A: dorsiflexion and inversion of foot; dorsiflexion of the great toe
Term
Extensor Digitorum Longus
Definition
O: lateral condyle of the tibia; anterior head and shaft of the fibula; interosseus membrane

I: dorsum of the middle and distal phalanges of the lesser toes

N: deep peroneal nerve

A: dorsiflexion of lesser toes; dorsiflexion and eversion of the foot
Term
Peroneus Tertius
Definition
O: distal 1/3 of anterior fibula and interosseus membrane

I: dorsum of the base of the 5th metatarsal

N: deep peroneal nerve

A: dorsiflexion and eversion of the foot
Term
Peroneus Longus
Definition
O: head and proximal 2/3 of the lateral fibula; lateral condyle of the tibia

I: lateral plantar surfaces of the 1st cunieform and base of the 1st metatarsal

N: superficial peroneal nerve

A: plantar flexion and eversion of the foot
Term
Peroneus Brevis
Definition
O: distal 2/3 of the lateral shaft of the fibula

I:tubercle of the base of the 5th metatarsal

N: superficial peroneal nerve

A: plantar flexion and eversion of the foot
Term
Extensor Digitorum Brevis
Definition
O: distal lateral surface of the calcaneus

I: lateral sides of the Extensor Digitorum Longus tendons on toes 2,3 and 4

N: deep peroneal nerve

A: dorsiflexion of toes 2-4
Term
Abductor Hallucis
Definition
O: medial tuberosity of the calcaneus; plantar aponeurosis.

I: medial side of the base of the proximal phalanx of the great toe

N: medial plantar nerve

A: Abduction of the great toe
Term
Flexor Digitorum Brevis
Definition
O: medial tuberosity of the calcaneus; plantar aponeurosis

I: plantar surface of the proximal phalanx of the lesser toes

N: medial plantar nerve

A: plantar flexes the lesser toes
Term
Abductor Digiti Minimi
Definition
O: Lateral tuberosity of the calcaneus; plantar aponeurosis.

I: Lateral side of the base of the proximal phalanx of the 5th toe

N: lateral plantar nerve

A: Abducts the 5th toe
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