A Posterior View Of The Lateral Part Of The Sacrum

Description

Rotating through a posterior perspective, the animation isolates the lateral sacrum, emphasizing the ala (wing) as it flares laterally from the fused sacral vertebrae. The rough, pitted dorsal surface comes into relief, with the lateral sacral crest running inferiorly toward the inferior lateral angle, and the posterior sacral foramina positioned medial to the ala. As the camera tracks along the margin, the auricular surface for the ilium sits anterolaterally relative to the dorsal tuberosity, clarifying how the lateral mass bridges the axial skeleton to the pelvis. Sacroiliac joint pain is often localized imprecisely, so being able to orient the sacral ala, dorsal sacral foramina, and adjacent crest landmarks matters in both physical exam correlation and image-guided intervention. A moving posterior survey clarifies which palpable irregularities belong to the sacrum versus the posterior ilium, and it helps learners understand why SI joint injections and posterior approaches target the region just lateral to the sacral foramina to avoid the dorsal rami and their branches. The textural emphasis on the dorsal surface also supports discussion of enthesopathic change and degenerative remodeling that can obscure normal contours. Use this animation in pelvic anatomy and osteology teaching blocks, in radiology education when pairing with posterior oblique CT or 3D reconstructions of the sacrum and SI region, and in pain management materials describing landmark-based versus fluoroscopy-guided sacroiliac procedures. Anatomical accuracy verified by SciePro's Medical Advisory Board.