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posterior leg comp.

GS, plantaris,popliteus,flex hallicus longus,flex digitorium longus, tibialis

muscleorigininsertioninnervationaction
tibialis posterior posterior, proximal tibia interosseous membrane medial surface of fibula navicular tuberosity (principle) all 3 cuneiforms (plantar surface) bases of 2nd-4th metatarsals cuboid sustentaculum tali of calcaneus tibial nerve, L5,S1 stabilizes ankle inversion & adduction of foot prevents hyperpronation while in gait weak plantarflexion of ankle
gastrocnemius medial head: just above medial condyle of femur lateral head: just above lateral condyle of femur calcaneus via lateral portion of calcaneal tendon tibial nerve, S1,2 plantarflex the ankle knee flexion (when not weight bearing) stabilizes ankle & knee when standing
soleus upper fibula soleal line of tibia : calcaneus via medial portion of calcaneal tendon tibial nerve, S1,2 plantarflex the foot
plantaris above the lateral head of gastrocnemius on femur calcaneus, medial to calcaneal tendon, or blending with the calcaneal tendon tibial nerve, S1,2
popliteus lateral femoral condyle arcuate popliteal ligament lateral meniscus knee joint capsule posterior tibial surface above the soleal line tibial nerve, L5,S1 insertion fixed: laterally rotates femur on tibia & unlocks knee origin fixed: medially rotates tibia on femur & unlocks knee
flexor hallicus longus posterior, inferior 2/3 of fibula interosseous membrane crural fascia & posterior intermuscular septum plantar surface of distal phalanx of hallux tibial nerve, L5,S1,2 flexes big toe (hallux) weak plantarflexion of the foot weak inversion & adduction of foot
flexor digitorum longus posterior surface of tibia crural fascia plantar surface of bases of the 2-5th distal phalanges tibial nerve, L5,S1 primarily flexes 2nd - 5th toes weak plantarflexor weak inversion & adduction of foot
Created by: scptguy19