A Posterior View Of The Superior Articular Process Of The Lumbar Vertebra

Description

Arising from the junction of pedicle and lamina, the superior articular process of a lumbar vertebra is presented from a posterior perspective as it projects superiorly and slightly medially toward the adjacent motion segment. The animation tracks across the dorsal elements so the superior articular facet comes into full view, its surface oriented posteromedially to meet the inferior articular facet of the vertebra above and complete the zygapophyseal (facet) joint. Spinous process, laminae, and the interarticular region frame the process, clarifying how the facet sits posterior to the vertebral body and lateral to the vertebral canal. Facet orientation in the lumbar spine is the mechanical reason flexion and extension are favored while axial rotation is constrained, and it is also where common pain generators live. Degenerative change of the zygapophyseal joint, including osteophytes and capsular hypertrophy, contributes to lumbar spondylosis and can narrow the lateral recess or intervertebral foramen, a frequent context for radicular symptoms and back-dominant pain. Seeing the facet surface sequentially, rather than as a single still, helps learners map palpation and injection targets to the bony landmarks surgeons and pain specialists use in posterior approaches. Use this animation in gross anatomy and musculoskeletal courses to teach posterior element morphology, and in spine radiology or pain medicine materials when correlating oblique lumbar radiographs, CT facet joint anatomy, or fluoroscopy-guided medial branch blocks and facet injections to real bony contours. It also fits well in orthopedic and neurosurgical teaching on pars interarticularis stress injury and facet-mediated low back pain. Anatomical accuracy verified by SciePro's Medical Advisory Board.