Popliteus
Innervation: Sciatic nerve
Branch: Tibial nerve
Function:
- Medially rotates tibia on the femur if the femur is fixed (sitting down).
- Laterally rotates femur on the tibia if tibia is fixed (standing up).
- Unlocks the knee to allow flexion.
- Helps to prevent the forward dislocation of the femur while crouching.