A Rear View Of The Superior Articular Process Of The Sacrum

Description

Seen from a posterior (rear) perspective, the animation centers on the paired superior articular processes of the sacrum at the base of the vertebral column, just inferior to the L5-S1 junction. Each process rises as a pointed bony eminence from the superior aspect of the sacral ala, with a smooth articular facet oriented superiorly and medially to meet the inferior articular facets of L5. Subtle rotation and focus shifts clarify how these facets bracket the sacral canal posteriorly while sitting medial to the posterior iliac crests and lateral to the median sacral crest. Orientation at the sacral superior articular facets matters in everyday clinical work because it frames the mechanics and stability of the lumbosacral facet joints. Abnormal facet orientation, degenerative arthropathy, or malalignment can contribute to L5-S1 facet-mediated low back pain and may coexist with spondylolysis or spondylolisthesis at L5. Sequential motion helps here: the animation makes it easier to appreciate the facet’s upward and medial facing surface and to mentally register the joint line you target when planning posterior approaches, fluoroscopic obliques, or CT-guided facet injections at the lumbosacral junction. Use this asset in spine anatomy teaching for medical and physiotherapy curricula, in radiology correlation modules explaining axial and oblique CT/MRI appearance of the L5-S1 facet complex, or in orthopedic and neurosurgical materials that introduce posterior lumbosacral exposure and instrumented fusion planning. It also supports patient-facing education on facet joint pain by anchoring the discussion in a clear posterior bony landmark. Anatomical accuracy verified by SciePro's Medical Advisory Board.