Which muscle group is located on the anterior of the upper leg?

• A. Hamstrings
• B. Quadriceps
• C. Calf
• D. Adductors

Answer: (B)

This question tests understanding of where major thigh muscles are located. The muscle group on the front of the thigh is the quadriceps, located in the anterior (front) compartment of the upper leg. They form the large mass you see on the front of the thigh and are primarily responsible for extending the knee (straightening the leg). In contrast, the hamstrings run along the back of the thigh and flex the knee, the adductors sit on the inner (medial) thigh, and the calf muscles are in the lower leg. So the anterior upper-leg location corresponds to the quadriceps, the four-muscle group that extends the knee.