The vastus lateralis muscle is one of the quadriceps muscles of the thigh. It originates on the greater trochanter, intertrochanteric line, and linea aspera of the femur. It inserts on the Patella via the quadriceps tendon and tibial tuberosity via the patellar ligament. It’s main function is to extend the knee. Trigger points in this muscle refer pain all along the lateral thigh and into the lateral knee.