Not shown are the Gluteus Medius and Minimus, which lie directly underneath the Gluteus Maximus.
The Gluteus Maximus originates along the pelvic bone crests and attaches to the rear of the femur.
The Gluteus Medius and Minimus originate in the same spot as the Maximus but attach to the side of the femur.
The Iliotibial Band is made only of connective tissue. This band serves to transfer the force of abduction (moving the leg away from the centerline of the body) to the leg.
The primary function of the Gluteus Maximus is hip extension (moving the thigh to the rear).
The Gluteus Medius and Minimus serve to abduct (move away from the centerline of the body) the leg.