Which bone landmark is the insertion of the psoas major?

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Psoas major acts as a powerful hip flexor, so its tendon must attach at a point on the femur that allows it to pull the thigh upward. The insertion is the lesser trochanter, located on the posteromedial aspect of the femur just below the neck, where the iliopsoas tendon anchors. The greater trochanter serves as the attachment for gluteal muscles and external rotators, the intertrochanteric line is a ridge between the trochanters, and the linea aspera is a rough ridge down the femoral shaft for various thigh muscles. So the lesser trochanter is the correct insertion site for the psoas major.