Summary Muscle Tables Leg.pdf

Summary Muscle Table: ANTERIOR compartment of leg Muscle Action Innervation Origin and Insertion Tibialis anterior Ankle dorsiflexion Inversion of foot Arch support Deep fibular nerve O: lateral tibia and interosseous membrane I: medial cuneiform and base of metatarsal 1 Extensor Extension o...

Summary Muscle Table: ANTERIOR compartment of leg Muscle Action Innervation Origin and Insertion Tibialis anterior Ankle dorsiflexion Inversion of foot Arch support Deep fibular nerve O: lateral tibia and interosseous membrane I: medial cuneiform and base of metatarsal 1 Extensor Extension of big toe hallucis longus Ankle dorsiflexion Deep fibular nerve O: medial fibula and interosseous membrane I: distal phalanx (dorsal) of big toe Extensor digitorum longus Deep fibular nerve O: medial fibula and lateral tibial condyle I: distal and middle phalanges (dorsal) of lateral four toes Extension of lateral four toes Ankle dorsiflexion Summary Muscle Table: LATERAL compartment of leg Muscle Action Innervation Origin and Insertion Fibularis longus Eversion of foot Arch support Superficial fibular nerve O: lateral fibula shaft I: medial cuneiform and base of metatarsal 1 Fibularis brevis Eversion of foot Superficial fibular nerve O: lateral fibula shaft I: base of metatarsal 5 Summary Muscle Table: POSTERIOR compartment of leg Muscle Action Innervation Origin and Insertion Gastrocnemius Knee flexion Ankle plantarflexion Tibial nerve O: Medial head – posterior distal femur, superior to medial condyle O: Lateral head – posterolateral surface of lateral condyle I: via calcaneal (Achilles) tendon to posterior calcaneus Soleus Ankle plantarflexion Tibial nerve O: soleal line on posterior tibia I: via calcaneal (Achilles) tendon to posterior calcaneus Popliteus Unlocks knee (laterally rotates femur on fixed tibia) Tibial nerve O: lateral femoral condyle I: posteromedial proximal tibia Flexor hallucis longus Flexes big toe Tibial nerve O: posterior fibula and interosseous membrane I: distal phalanx (plantar) of big toe Flexor digitorum longus Flexes lateral four toes Tibial nerve O: posteromedial tibia I: distal phalanges (plantar) of lateral four toes Tibialis posterior Ankle plantarflexion Inversion of foot Medial arch support Tibial nerve O: posterior tibia and fibula I: navicular tuberosity and medial cuneiform