Leg Muscles Flashcards
Tibialis Anterior
O: Upper 2/3 of tibia, interosseus membrane
I: First metatarsal, medial cuneiform
A: Dorsiflex and invert foot
N: Deep fibular nerve (peroneal)
Extensor Hallucis Longus
O: Fibula, interosseus membrane
I: Distal phalanx of hallux (big toe)
A: Extend the hallux and dorsiflex the foot
N: Deep fibular nerve (peroneal)
Extensor Digitorum Longus
O: Upper 3/4 of fibula, interosseus membrane
I: Middle and distal phalanges (2-5)
A: Extend lateral 4 toes and dorsiflex the foot
N: Deep fibular (peroneal)
Fibularis Tertius
O: Lower 1/3 of fibula
I: 5th metatarsal
A: Dorsiflex and evert foot
N: Deep fibular (peroneal)
Fibularis Longus
O: Upper 2/3 of fibula
I: 1st metatarsal and medial cuniform
A: Evert and plantar flex the foot
N: Superficial fibular nerve
Fibularis Brevis
O: Lower 1/3 of the fibula
I: 5th metatarsal
A: Evert and plantar flex the foot
N: Superficial fibular nerve
Gastrocnemius
O: Femoral condyles
I: Calcaneus (heel bone)
A: Plantar flex foot (fast) and flex knee
N: Tibial nerve
Soleus
O: Upper fibula and tibia
I: Calcaneus
A: Plantar flex foot (slow) and maintain standing
N: Tibial nerve
Plantaris
O: Lateral supracondylar ridge
I: Calcaneus
A: Plantar flex foot
N: Tibial nerve
Flexor Digitorum Longus
O: Tibia
I: Distal phalanges (2-5)
A: Flex toes and plantar flex foot
N: Tibial
Flexor Hallucis Longus
O: Fibula
I: Distal phalanx of the hallux
A: Flex hallux and plantar flex the foot
N: Tibial nerve
Tibialis Posterior
O: Tibia, fibula, interosseus membrane
I: Navisular, calcaneus, cuboid, all cuneiforms, metatarsals 2-4
A: Invert and plantar flex the foot
N: Tibial nerve
