The Anatomical Features And Location Of The Iliac Crests On The Pelvic Girdle

Description

Sweeping across the superior margin of each ilium, the animation identifies the iliac crest as the curved ridge forming the upper border of the pelvic girdle, extending from the anterior superior iliac spine (ASIS) anteriorly to the posterior superior iliac spine (PSIS) posteriorly. The crest is presented in relation to the iliac fossa medially and the gluteal surface laterally, with the sacrum and sacroiliac joints providing a posterior midline reference. As the sequence progresses, the pelvis is oriented in anatomical position so the viewer can track how the right and left crests sit superior to the acetabula and lateral to the sacral promontory. Bony landmarks come into clear spatial order. Clinically, the iliac crest is a high-frequency surface landmark for palpation, procedural guidance, and safe orientation on imaging. The animation clarifies how the palpable ASIS leads posteriorly along the crest toward the PSIS, a relationship used when planning incisions for iliac crest bone graft harvest and when selecting needle entry points for posterior approaches near the sacroiliac region. It also grounds the common teaching correlation that an intercristal (Tuffier’s) line between the highest points of the iliac crests approximates the L4 spinous process or L4 to L5 interspace, a practical reference during lumbar puncture and neuraxial anesthesia. Use this animation in gross anatomy and musculoskeletal modules to teach pelvic osteology, in physical examination training to reinforce palpation targets, and in radiology education to connect surface anatomy with CT or plain-film pelvic landmarks. Medical-legal illustrators and surgical authors will also find it well-suited for explaining iliac crest grafting, pelvic fracture localization, and landmark-based spinal procedures. Anatomical accuracy verified by SciePro's Medical Advisory Board.