Iliofemoral Ligament, Anterior View

Description

Centered on the anterior hip capsule, the iliofemoral ligament fans from the anterior inferior iliac spine and adjacent acetabular rim toward the intertrochanteric line of the proximal femur, forming its characteristic inverted Y. Its lateral band courses inferolaterally toward the greater trochanteric side of the intertrochanteric line, while the medial band runs more inferomedially toward the lesser trochanteric side, spanning the front of the femoral neck. Surrounding bony landmarks include the ilium, pubis, and ischium framing the acetabulum, with the lumbar vertebral bodies and intervertebral discs superior and posterior to the pelvic ring. Anterior capsuloligamentous anatomy matters because the iliofemoral ligament is the primary passive restraint to hip extension and anterior translation, the reason a standing hip can “lock” with minimal muscular effort. It also explains common exam findings, for example a fixed flexion contracture of the hip that limits extension in osteoarthritis or after prolonged immobilization, and it is directly encountered during anterior approaches to the hip where capsulotomy and repair influence postoperative stability. A critical landmark. The bifid banding also helps orient learners to how the capsule blends with adjacent fascia and retinacular fibers that carry vascular branches along the femoral neck. Orthopaedic texts, sports medicine teaching files, and physical therapy modules on hip biomechanics can use this artwork to link surface motion (extension, external rotation) to specific capsular tension patterns. It also fits operative anatomy content for the direct anterior approach in total hip arthroplasty, and for radiology correlation when describing anterior capsular thickening or avulsion at the AIIS in trauma and overuse. Anatomical accuracy verified by SciePro's Medical Advisory Board.