Popliteus - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The popliteus is a muscle within the deep compartment of the posterior leg. It lies behind the knee joint, forming the base of the popliteal fossa. Attachments: Originates from the lateral condyle of the femur and the lateral meniscus of the knee joint. It inserts onto the proximal tibia, immediately above the origin of the soleus muscle. Actions: Lateral rotation of the femur relative to the tibia. This ‘unlocks’ the knee joint so that flexion can occur. Innervation: Tibial nerve Blood supply: Popliteal artery By TeachMeSeries Ltd (2026) Fig 1Muscles in the deep layer of the posterior leg. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Frequent questions What is the popliteus muscle? The popliteus is a muscle located in the deep compartment of the posterior leg, situated behind the knee joint and forming the base of the popliteal fossa. What are the attachments of the popliteus muscle? The popliteus originates from the lateral condyle of the femur and the lateral meniscus of the knee joint, and it inserts onto the proximal tibia, just above the origin of the soleus muscle. What is the primary action of the popliteus? The primary action of the popliteus muscle is the lateral rotation of the femur in relation to the tibia, which effectively 'unlocks' the knee joint to allow for flexion. Which nerve innervates the popliteus muscle? The popliteus muscle is innervated by the tibial nerve, which provides the necessary motor function for its actions. What is the blood supply to the popliteus muscle? The blood supply to the popliteus muscle comes from the popliteal artery, ensuring it receives adequate oxygen and nutrients for its functions. Rate This Article