Superior Articular Process Of The Thoracic Vertebra, Posterior View

Description

Superior articular process of a thoracic vertebra occupies the posterolateral margin of the vertebral arch, rising superiorly from the junction of pedicle and lamina. From this posterior perspective, the superior articular facet faces mostly posteriorly with a mild lateral orientation, forming the upper half of the zygapophysial (facet) joint with the inferior articular process of the vertebra above. Adjacent bony landmarks of the arch, including the lamina medial to the process and the base of the transverse process laterally, provide spatial reference for the facet’s position relative to the spinal canal. Cortical margins and the flattened, plate-like contour of the process are emphasized. A key landmark. Facet joint anatomy in the thoracic spine underlies common patterns of mid-back pain, osteoarthritic facet hypertrophy, and degenerative spondylosis, where enlargement of the superior articular process can narrow the lateral recess or contribute to foraminal stenosis in concert with disc height loss. Because thoracic zygapophysial joints constrain rotation and couple with rib-associated biomechanics, accurate orientation of the superior articular facet helps explain regional differences from cervical and lumbar levels during teaching and during image interpretation. Focused isolation of the process and adjacent arch clarifies how articular cartilage surfaces align and where capsular attachments would sit along the facet margins. Use this illustration for gross anatomy labs covering the vertebral column, for radiology teaching files when correlating osseous landmarks to CT bone windows, and for spine surgery texts discussing posterior element anatomy and facet-mediated pain procedures such as medial branch blocks or radiofrequency denervation. Anatomical accuracy verified by SciePro's Medical Advisory Board.