Rectus Femoris origin?

Rectus Femoris origin?

• A. Ischial tuberosity
• B. Pubic symphysis
• C. Greater trochanter
• D. Iliac spine and acetabulum

Answer: (D)

Rectus femoris has two proximal attachments on the pelvis: the anterior inferior iliac spine and the ilium just above the acetabulum. That combination—iliac spine and acetabular region—best matches its two-part origin. Remember, this muscle is unique in the quadriceps because it crosses the hip joint as well as the knee, so its AIIS origin lets it help flex the hip while its tendon extends to the patella to extend the knee. The other options point to different muscles: the ischial tuberosity is the origin for the hamstrings, the pubic symphysis for some adductors, and the greater trochanter for the gluteus medius/minimus.