What muscle group is the rectus femoris in?

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

Answer: (D)

The main idea is identifying which muscle group the rectus femoris belongs to based on location and function. The rectus femoris is one of the four muscles that make up the quadriceps group, located on the front of the thigh. The quadriceps work together to extend the knee, with the rectus femoris also crossing the hip joint, which gives it a secondary role in hip flexion. That combination of front-thigh location and action places it squarely in the quadriceps.

It isn’t part of the gluteal muscles (which are in the buttocks and primarily move the hip), nor part of the adductors (inner thigh muscles that pull the leg toward the midline), nor part of the hamstrings (the back-of-thigh group that mainly flexes the knee and extends the hip). The rectus femoris’ role in knee extension and its placement among the front-thigh quadriceps make it the best answer.