A Posterior View of the Gluteus Maximus Under the Skin of a Male Body

Description

Dominating the posterior hip, the gluteus maximus forms a thick muscular cap over the gluteal region, spanning from the posterior ilium, dorsal sacrum, and coccyx to the iliotibial tract laterally and the gluteal tuberosity of the femur inferiorly. Along the superolateral buttock, the upper border of gluteus maximus reveals the gluteus medius, which fans from the iliac crest toward the greater trochanter. Medial to the greater trochanter and deep to these layers, the expected course of the sciatic nerve lies inferior to the piriformis as it exits the greater sciatic foramen, running distal and lateral into the posterior thigh. Bony landmarks, including the sacrum, posterior superior iliac spines, and proximal femur, anchor the muscle relationships in anatomical position. Orientation is unambiguous. Posterior gluteal anatomy matters because it is where surface form and high-stakes neurovascular pathways overlap. The sciatic nerve’s proximity to the inferior border of gluteus maximus and the short external rotators explains the classic risk of iatrogenic injury with misplaced gluteal intramuscular injections and also frames the surgical corridor for a posterior approach to total hip arthroplasty, where protection of the sciatic nerve and repair of the external rotators can reduce postoperative instability. Gluteus medius is the other headline. Denervation of the superior gluteal nerve or tendon degeneration at the greater trochanter produces abductor weakness, Trendelenburg gait, and the lateral hip pain syndrome often labeled greater trochanteric pain syndrome. Use this artwork in gross anatomy and kinesiology teaching to connect pelvic landmarks to the gluteal muscles and the sciatic nerve pathway, and in orthopedic, sports medicine, and regional anesthesia materials when explaining hip arthroplasty exposure, deep gluteal syndrome, or landmark-based sciatic nerve block planning. Anatomical accuracy verified by SciePro's Medical Advisory Board.