Anatomical Location Of The Obturator Groove On The Surface Of The Hip Bone

Description

Obturator groove anatomy is centered on the inferior surface of the superior pubic ramus, immediately superior to the obturator foramen and just lateral to the pubic symphysis. The sulcus tracks along the pubic component of the obturator margin, approaching the junction with the ischial ramus where the bony rim contributes to the proximal boundary of the obturator canal. Medially, the surface transitions onto the body of the pubis and the symphyseal face, while laterally it relates toward the acetabular region through the iliopubic (iliopectineal) eminence and the superior pubic ramus. The obturator groove matters because it is the bony seat for the obturator neurovascular bundle as it passes from the pelvic cavity into the medial thigh; when completed by the obturator membrane and adjacent soft tissue, the groove forms the superior wall of the obturator canal. Small shifts in this bony contour can influence the canal’s caliber and the relationship of the obturator nerve, artery, and vein, a point worth emphasizing when teaching pelvic trauma patterns or discussing entrapment-type groin pain with adductor weakness. A tight, inferomedial perspective on the pubic ramus makes the sulcus easy to localize relative to the obturator foramen’s rim and the expected line of the obturator membrane. This is a key landmark. Use this illustration in gross anatomy labs, pelvic osteology modules, and radiology teaching files when correlating CT assessment of pubic ramus fractures with potential obturator canal involvement, and in surgical education covering obturator hernia repair, pelvic lymphadenectomy boundaries, or obturator nerve block planning. Anatomical accuracy verified by SciePro's Medical Advisory Board.