What is the insertion of the Vastus Lateralis?

• A. Tibial tuberosity
• B. Hip joint capsule
• C. Greater trochanter
• D. Patella

Answer: (A)

Focusing on how the quadriceps attach to the leg helps you see why the tibial tuberosity is the distal insertion path for the vastus lateralis. The vastus lateralis joins the quadriceps tendon and inserts on the patella. From there, the patellar ligament runs down to the tibial tuberosity, transmitting the muscle’s force to the tibia to straighten the knee. So the bone that ultimately receives the pull is the tibial tuberosity. The other options don’t fit because the greater trochanter is a proximal femur site, the hip joint capsule is a joint structure, and while the patella is part of the route, the direct distal insertion that transmits force to the tibia is the tibial tuberosity via the patellar ligament.