The Superior Articular Process Of The Lumbar Vertebra In Lateral View

Description

Rising from the posterior elements of a lumbar vertebra, the superior articular process projects superiorly from the junction of the pedicle and lamina, just posterior to the vertebral body and lateral to the vertebral canal. In lateral view, the animation tracks along the stout bony column into the superior articular facet, where the facet surface turns to face posteromedially toward its mate on the vertebra above. As the camera glides, the pars interarticularis comes into profile between the superior and inferior articular processes, with the lamina sweeping posteriorly toward the spinous process. Facet orientation in the lumbar spine governs motion, so seeing the superior articular facet in profile helps explain why flexion and extension dominate while axial rotation remains constrained. This is the bony substrate of lumbar facet arthropathy, a common pain generator, and it is also the landmark complex that surgeons and interventionalists target during medial branch blocks and radiofrequency ablation along the junction of the transverse process and superior articular process. The animated sequence clarifies how the pedicle-lamina junction, pars interarticularis, and facet line up in three dimensions, a relationship that is easy to misread in a single static frame. Use this clip in gross anatomy labs, spine biomechanics lectures, or as a figure replacement in orthopedic and radiology teaching files discussing spondylolysis at the pars interarticularis and degenerative facet joint disease. It also fits preoperative education for posterior lumbar approaches where pedicle screw trajectories and facet preservation depend on recognizing the superior articular process. Anatomical accuracy verified by SciePro's Medical Advisory Board.