Anterior + Lateral Leg, Dorsal Foot
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9 Terms
Tibialis Anterior
A- dorsiflexes ankle, inverts foot
O- lateral tibial condyle, upper lateral surface of tibia, and interosseus membrane
I- medial surface of medial cuneiform and 1st metatarsal
Inn- deep fibular/peroneal nerve (l3-S1)
Blood- anterior tibial artery
Extensor Digitorum Longus
A- extends MTPs, PIPS, and DIPs of toes 2-5, dorsiflexes ankle
O- lateral condyle of tibia, anterior surface of fibula, interosseus membrane
I- bases of dorsal and distal phalanges 2-5 on the extensor expansion
Inn- deep fibular/peroneal nerve (l3-S1)
Blood- anterior tibial artery
Extensor Hallucis Longus
A- extend the MTP and IP of great toe
O- lower anterior fibula and interosseus membrane
I- base of dorsal distal phalanx of great toe
Inn- deep fibular/peroneal nerve (l3-S1)
Blood- anterior tibial artery
Fibularis Tertius
A- dorsiflexion of ankle, eversion of foot
O- anterior surface of fibula, tibiofibular ligament, intermuscular septum
I- dorsal surface at the 5th metatarsal base
Inn- deep fibular/peroneal nerve (l3-S1)
Blood- anterior tibial artery
Fibularis Longus
A- everts foot, plantarflexes ankle
O- upper, lateral fibula
I- base of 1st metatarsal and medial cuneiform
Inn- superficial peroneal/fibular nerve
Blood- fibular artery
Fibularis Brevis
A- everts foot, plantarflexes ankle
O- distal, lateral fibula
I- base of 5th metatarsal
Inn- superficial peroneal/fibular n
Blood- fibular artery
Extensor Digitorum Brevis
A- extends MTPs and PIPs 2-4
O- superolateral calcaneus
I- dorsal middle phalanges 2-4
Inn- deep fibular/peroneal nerve (l3-S1)
Blood- dorsal pedis and lateral plantar
Extensor Hallucis Brevis
A- extends 1st MTP
O- superolateral calcaneus
I- dorsal base of proximal phalanx of great toe
Inn- deep fibular/peroneal nerve (l3-S1)
Blood- dorsal pedis and lateral plantar
4 Dorsal Interossei
A- abducts digits 2-4, flexes MTPs, and extends IPs 2-4
O- adjacent shafts of all 5 metatarsals
I- lateral bases of proximal phalanges 2-4, medial of digit 2, on the expansion hoods
Inn- lateral plantar nerve
Blood- dorsal pedis and lateral plantar