<prompt> Action of popliteus is -Locking of knee joi ntUnlocking of knee jointMedial rotation of femur on tibiaNone  <response>: Ans. is b i.e., Unlocking of knee joint Popliteus Popliteus is a deep muscle of posterior compartment of leg. Features of popletius are -Origin Lateral surface of lateral condyle of femur, origin is intracapsular. Outer margin of lateral meniscus of knee.Insertion Posterior surface of shaft of tibia above soleal line.Nerve supply Tibial nerveAction Ulocks knee joint by lateral rotation of femur on tibia prior flexion. Accessory flexor of knee. 