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Kinesiology
LE muscles: origins, insertions, nerve, actions
| Question | Answer |
|---|---|
| Soleus | O:Posterior tibia and fibula I:Posterior calcaneus A:Ankle plantar flexion N:tibial nerve |
| tibialis posterior | O: Interosseous membrane, adjacent tibia and fibula I:Navicular and most tarsals and metatarsals A:Ankle inversion; assists in plantar flexion N:Tibial nerve |
| popliteus | O:Lateral condyle of femur I:Posterior surface of medial condyle of tibia A:Initiates knee flexion N:Tibial nerve |
| gastrocnemius | O:Medial and lateral condyles of femur I:Posterior calcaneus A:Knee flexion, ankle plantar flexion N:Tibial nerve |
| plantaris | Posterior lateral condyle of femur I:Posterior calcaneus A:Very weak assist in knee flexion and ankle plantar flexion N:Tibial nerve |
| vastus intermedialis | O:Anterior femur I:Tibial tuberrosity via patellar tendon A:Knee extension N:Femoral nerve |
| vastus medialis | O:Linea aspera I:Tibial tuberosity via patellar tendon A:Knee extension N:Femoral nerve |
| vastus lateralis | O:Linea aspera I:Tibial tuberosity via patellar tendon A:Knee extension N:Femoral nerve |
| extensor digitorum longus | O:Fibula, interosseous membrane, tibia I:Distal phalanx of four lesser toes A:Extends four lesser toes, assists in ankle dorsiflexion N:Deep peroneal nerve |