Gluteus Maximus

Origin Posterior aspect of dorsal ilium posterior to posterior gluteal line, posterior superior iliac crest, posterior inferior aspect of sacrum and coccyx, and sacrotuberous ligament
Insertion Primarily in fascia lata at the iliotibial band; also into the gluteal tuberosity on posterior femoral surface
Action Major extensor of hip joint, assists in laterally rotating the thigh; upper and middle third section of the muscle are abductors
Innervation Inferior gluteal nerve (L5, S1, S2) (L5, S1, S2)
Arterial Supply Inferior and superior gluteal arteries and the first perforating branch of the profunda femoris artery

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Muscle Atlas of the Extremities