Rectus Femoris origin?

Rectus Femoris origin?

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

Answer: (D)

Rectus femoris originates from the pelvis, not the femur, because it crosses both hip and knee joints. It has two proximal attachments: the anterior inferior iliac spine (AIIS) and the upper rim of the acetabulum. This “iliac spine and acetabulum” region explains its role in flexing the hip. The insertion is into the tibial tuberosity via the quadriceps tendon and patellar ligament, enabling knee extension. Other proximal sites belong to different groups: the ischial tuberosity is the origin for the hamstrings, the pubic symphysis for some adductors, and the greater trochanter for parts of the gluteal group.

Rectus femoris originates from the pelvis, not the femur, because it crosses both hip and knee joints. It has two proximal attachments: the anterior inferior iliac spine (AIIS) and the upper rim of the acetabulum. This “iliac spine and acetabulum” region explains its role in flexing the hip. The insertion is into the tibial tuberosity via the quadriceps tendon and patellar ligament, enabling knee extension.

Other proximal sites belong to different groups: the ischial tuberosity is the origin for the hamstrings, the pubic symphysis for some adductors, and the greater trochanter for parts of the gluteal group.