Pronunciation (GLOO-te-us MAK-si-mus) Origin/Proximal Attachment Outer rim of ilium (medial aspect); dorsal surface of sacrum & coccyx; sacrotuberous ligament Insertion/Distal Attachment Iliotibial (IT) band & gluteal tuberosity of femur Action/Relevance Extends the hip Externally rotates Upper fibres aid to abduct thigh Assists stabilization of a fully extended knee (via IT band) Innervation Inferior Gluteal nerve (L5, S1, 2) Notes Forms bundles of thick fasciculae separated by fibrous septa. Provides coarse appearance. Upper fibres attach to ITB, lower portion to gluteal tuberosity of femur. | 
