gluteus maximus
O- coccyx, edge of sacrum, posterior iliac crest, sacrotuberous and sacroiliac ligaments
I- iliotibial tract (upper fibers) and gluteal tuberosity (lower fibers)
gluteus medius
O- gluteal surface of ilium, between posterior and anterior gluteal lines, just below the iliac crest
I- lateral aspect of greater trochanter
gluteus minimus
O- gluteal surface of the ilium between the anterior and inferior gluteal lines
I- anterior aspect of greater trochanter