Gluteus Maximus: The gluteus maximus is the largest of the gluteal muscles. It is the main extensor muscle of the hip. It is also the most superficial, producing the shape of the buttocks.
Origin: Originates from the posterior surface of the ilium, sacrum, and coccyx. It slopes across the buttock at a 45-degree angle.
Insertion: It inserts into the iliotibial tract and the gluteal tuberosity of the femur.
Function: The gluteus maximus is the main extensor of the thigh and assists with lateral rotation.
Nerve Supply: Inferior gluteal nerve.