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glu·te·us max·i·mus (mus·cle)[TA]
superficial muscle of buttock; origin, ilium behind posterior gluteal line, posterior surface of sacrum and coccyx, and sacrotuberous ligament; insertion, iliotibial band of fascia lata (superficial three quarters) and gluteal ridge (deep inferior one quarter) of femur; action, extends thigh, especially from the flexed position, as in climbing stairs or rising from a sitting position; nerve supply, inferior gluteal.
Synonym(s): musculus gluteus maximus [TA]
n. pl. glutei (glo͞o′tē-ī′, glo͞o-tē′ī′)
Any of the three large muscles of each buttock, especially the gluteus maximus, that extend, abduct, and rotate the thigh.
any of the three muscles that form the buttocks: the gluteus maximus, gluteus medius, and gluteus minimus. The gluteus maximus is a large muscle with an origin in the ilium, the sacrum, and the sacrotuberous ligament and an insertion in the gluteal tuberosity of the femur and the fascia lata. It acts to extend the thigh. The gluteus medius originates between the anterior and posterior gluteal lines of the ilium and inserts in the greater trochanter of the femur. It acts to abduct and medially rotate the thigh. The gluteus minimus originates between the inferior and anterior gluteal lines of the ilium and inserts in the greater trochanter of the femur. It acts to abduct the thigh.