Superior Articular Process Of The Lumbar Vertebra, Superior View

Description

Superior articular process of a lumbar vertebra occupies the posterolateral margin of the vertebral arch, rising from the junction of the pedicle and lamina and terminating in the superior articular facet (zygapophyseal facet). From a superior perspective, the facet surface appears gently concave to slightly curved and faces predominantly posteromedially, positioned lateral to the vertebral canal and medial to the transverse process region. The articular cartilage bearing surface sits just posterior to the pedicle, where it will meet the inferior articular process of the vertebra immediately superior to form the paired lumbar zygapophyseal (facet) joints. Bony margins, including the base of the spinous process and the laminar roof, frame the facet complex. Facet orientation in the lumbar spine governs coupled motion and helps resist anterior translation, so subtle changes in the contour of the superior articular facet matter in both biomechanics teaching and clinical explanation of low back pain. Degenerative facet arthrosis, synovial cyst formation, and capsular hypertrophy can narrow the lateral recess and contribute to radicular symptoms, while asymmetric facet remodeling is often discussed in the setting of degenerative spondylolisthesis at L4 to L5. The fixed superior viewpoint helps you relate the joint line to the vertebral canal and the pedicle corridor, a practical reference when correlating to axial CT or MRI slices used for preprocedural planning. Use this illustration in spine anatomy courses when introducing zygapophyseal joint planes, in radiology teaching files to match axial cross-sectional landmarks, or in pain medicine materials describing medial branch blocks and radiofrequency denervation targets at the junction of the superior articular process and transverse process. It also suits orthopedic and neurosurgical publishing on lumbar facet arthropathy, pars interarticularis stress injury discussions, and segmental stability diagrams. Anatomical accuracy verified by SciePro's Medical Advisory Board.