ONIA: Ant. compartment of Leg

Ant. compartment of Leg

Tibialis Anterior Proximal attachment

Lateral condyle, superior half of lateral surface of tibia, & interosseous membrane

Tibialis anterior Distal attachment

Medial and inferior surfaces of medial cuneiform & base of 1st metatarsal

Tibialis anterior Nerve

Deep fibular N. (L4,L5)

Tibialis anterior Action

Dorsiflexes ankle joint & inverts subtalar joint

Extensor Digitorum Longus Proximal attachment

Lateral condyle, superior three quarters of medial fibula, & interosseous membrane

Extensor Digitorum Longus Distal attachment

Middle and distal phalanges of lateral four digits

Extensor Digitorum Longus Nerve

Deep fibular N. (L5,S1)

Extensor Digitorum Longus Action

Extends lateral four digits and dorsiflexes ankle joint

Extensor Hallucis Longus Proximal attachment

Middle part of anterior surface of fibula & interosseous membrane

Extensor Hallucis Longus Distal attachment

Dorsal aspect of base of distal phalanx of great toe (hallux)

Extensor Hallucis Longus Nerve

Deep Fibular N. (L5,S1)

Extensor Hallucis Longus Action

Extends great toe & dorsiflexes ankle joint

Fibularis tertius Proximal attachment

Inferior third of anterior surface of fibula & interosseous membrane

Fibularis tertius Distal attachment

Dorsum of base of 5th metatarsal

Fibularis tertius Nerve

Deep Fibular N. (L5,S1)

Fibularis tertius Action

Dorsiflexes ankle & aids in eversion of subtalar joint