Gluteal Surface Of The Ilium, Posterior View

Description

Ilium gluteal surface anatomy dominates the frame, with the iliac crest forming the superior border and the broad lateral ala sweeping inferiorly toward the acetabular region (only the superior acetabular margin is implied, not centered). Posteriorly, the posterior superior iliac spine and posterior inferior iliac spine mark the transition toward the greater sciatic notch, while the posterior part of the gluteal surface remains continuous with the iliac tuberosity and auricular area medially at the sacroiliac region. Curving gluteal lines are readable on the outer table, separating the attachment areas for gluteus maximus posteriorly and gluteus medius more anteriorly, with gluteus minimus deep to medius along the anteroinferior ala. Bony relief is the teaching point. Surface landmarks on the posterior ilium guide both examination and procedure. The posterior superior iliac spine is a common palpation reference for sacroiliac joint pain mapping and for orienting fluoroscopic or ultrasound guided sacroiliac injections, and its relationship to the greater sciatic notch helps learners avoid confusing SI region pain with posterior hip pathology. Muscle attachment geography matters clinically: weakness or denervation of gluteus medius and minimus (often from superior gluteal nerve injury in lateral hip approaches) produces a Trendelenburg gait, and the gluteal lines provide a concrete way to explain why those abductors sit superior and lateral on the ilium rather than on the ischium or pubis. Orthopaedic anatomy lectures, pelvic girdle labs, and surgical approach figures for posterior and lateral hip exposure all benefit from an illustration that isolates the gluteal surface without distractions from femur or lumbar spine. It also suits exam-prep diagrams on pelvic fractures, iliac crest bone graft harvesting corridors, and the relationship of PSIS to sacroiliac joint landmarks in pain medicine. Anatomical accuracy verified by SciePro's Medical Advisory Board.