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IOANS
Muscles of the knee
| muscles | origins | insertion | action | innervation |
|---|---|---|---|---|
| Vastus Lateralis | linea aspera | tibial tuberosity via patellar tendon | knee extension | femoral nerve |
| Vastus intermedialis | anterior femur | tibial tuberosity via patellar tendon | knee extension | knee extension |
| Vastus Medialis | Linea aspera | tibial tuberosity via patellar tendon | knee extension | femoral nerve |
| Rectus Femoris | Anterior inferior iliac spine | Tibial tuberosity via patellar tendon | Hip flexion, knee extension | Femoral nerve |
| Semitendinosus | ischial tuberosity | anteromedial surface of proximal tibia | Hip extension and knee flexion | sciatic nerve-tibial division |
| Semimembranosus | Ischial tuberosity | Posterior surface of medialcondyle of tibia | Hip extension and knee flexion | Sciatic nerve |
| biceps femoris | Long head: Ischial tuberosity Short head: Lateral lip of lineaaspera | Fibular head | Long head: Hip extension and knee flexion Short head: knee flexion | Long head: Sciatic nerve Short head: Common peroneal nerve |
| Tensor Fascia Latae (TFL) | Anterior superior iliac spin | lateral condyle of tibia | combined hip flexion and abduction | superior gluteal nerve |
| Gastrocnemius | medial and lateral condyles of femur | posterior calcaneus | knee flexion and ankle plantar flexion | tibial nerve |
| Soleus | posterior tibia and fibula | posterior calcaneus | ankle plantar flexion | tibial nerve |
| Popliteus | lateral condyle of femur | posterior surface of medial condyle of tibia | initiates knee flexion | tibial nerve |