Sacrotuberous Ligament, Lateral View

Description

Running from the lateral margin of the sacrum toward the posterior-inferior pelvis, the sacrotuberous ligament appears as a broad, coarse band spanning to the ischial tuberosity. In profile, the ischium sits inferior and posterior to the acetabulum, while the iliac crest rises superiorly and the lumbar vertebrae stack posterior to the pelvic brim. A total hip arthroplasty is present, with the prosthetic femoral head seated within the acetabular component and the proximal femur extending distally. Clear bony landmarks. Because it anchors the sacrum to the ischial tuberosity, the sacrotuberous ligament helps resist sacral nutation and stabilizes the posterior pelvic ring under load. This lateral perspective also supports teaching of the lesser and greater sciatic foramina, where the sacrotuberous and sacrospinous ligaments convert sciatic notches into clinically relevant passageways; the relationship matters when discussing pudendal nerve entrapment near the ischial spine and Alcock canal, or posterior pelvic pain patterns after trauma. The juxtaposition with a hip replacement adds context for posterolateral hip approaches, where external rotators and posterior soft tissues are repaired to reduce dislocation risk, yet the sacrotuberous ligament remains a dependable posterior-inferior pelvic landmark. Use this artwork in gross anatomy and musculoskeletal modules covering pelvic ligaments, sacroiliac mechanics, and perineal neurovascular pathways, or in orthopaedic and radiology publications that contrast native pelvic stabilizers with arthroplasty hardware. It also suits patient-facing materials on hip arthroplasty when you want to orient viewers using the ischial tuberosity and sacrum rather than isolated implants. Anatomical accuracy verified by SciePro's Medical Advisory Board.