Vastus Intermedius - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The vastus intermedius is a muscle in the anterior compartment of the thigh. It forms part of the quadriceps femoris muscle complex. Attachments: Originates from the anterior and lateral surfaces of the femoral shaft. It inserts onto the patella via the quadriceps femoris tendon. The patella is then attached to the tibial tuberosity by the patella ligament. Actions: Extension of the knee joint. It has a secondary function of stabilising the patella. Innervation: Femoral nerve Blood Supply: Lateral circumflex femoral artery By TeachMeSeries Ltd (2026) Fig 1The muscles of the anterior thigh. 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 vastus intermedius muscle? The vastus intermedius is a muscle located in the anterior compartment of the thigh and is a component of the quadriceps femoris muscle group. It plays a crucial role in knee extension and stabilisation of the patella. Where does the vastus intermedius originate and insert? This muscle originates from the anterior and lateral surfaces of the femoral shaft and inserts onto the patella through the quadriceps femoris tendon. The patella is subsequently connected to the tibial tuberosity by the patellar ligament. What is the primary function of the vastus intermedius? The primary function of the vastus intermedius is to extend the knee joint. Additionally, it helps in stabilising the patella during movement. Which nerve innervates the vastus intermedius? The vastus intermedius is innervated by the femoral nerve. This nerve supplies the entire quadriceps muscle group, facilitating knee extension. What is the blood supply to the vastus intermedius? The blood supply to the vastus intermedius comes from the lateral circumflex femoral artery. This artery ensures adequate circulation to the muscle for proper function and health. Rate This Article