Intervertebral Surface Of The Lumbar Vertebra, Anatomy

Description

Lumbar vertebral endplate anatomy dominates the frame, with the intervertebral surface of the vertebral body presented en face as a broad, gently concave plateau bounded by a thicker peripheral rim (ring apophysis). A thin subchondral bony plate caps the superior aspect of the vertebral body, while the outer annular attachment zone sits circumferentially at the margin where the annulus fibrosus would anchor to Sharpey-type fibers. Central trabecular bone lies deep to the endplate, transitioning to denser cortical bone at the rim. Weight transmission is the theme. Clinically, the vertebral endplate is where disc degeneration and vertebrogenic pain often intersect, since fissuring of the endplate and marrow changes (Modic-type signal on MRI) correlate with low back pain and inflammatory endplate remodeling. This illustration offers a focused look at the morphology that governs load sharing between the nucleus pulposus, annulus fibrosus, and the bony endplate, making it easier to explain why endplate defects can permit intravertebral disc herniation (Schmorl nodes) or contribute to microfracture under axial compression. Subtle curvature and the peripheral thickening help orient the viewer to the mechanical “ring” that resists bulging and collapse. Use this illustration in a gross anatomy or biomechanics lecture to connect lumbar vertebral body structure with intervertebral disc function, or in orthopedic spine and neurosurgery teaching materials covering interbody fusion, endplate preparation, and implant subsidence risk. It also pairs well with radiology content when correlating endplate contour and sclerosis with CT, or marrow signal adjacent to the endplate with MRI. Anatomical accuracy verified by SciePro's Medical Advisory Board.