Thoracic Vertebrae's Superior Articular Process, Lateral View

Description

Superior articular process of a typical thoracic vertebra occupies the posterolateral margin of the vertebral arch, rising from the junction of the pedicle and lamina just superior to the transverse process. From a lateral perspective, the superior articular facet is seen facing posteriorly and slightly laterally, positioned superior to the inferior articular process of the same vertebra and inferior to the corresponding facet on the vertebra above. The adjacent lamina and a portion of the spinous process base sit posteriorly, while the vertebral body lies anterior and inferior to the facet region. Facet orientation in the thoracic spine (zygapophysial joints) underpins the region’s characteristic mechanics, limiting flexion and extension compared with the cervical and lumbar regions while accommodating controlled rotation and maintaining stability for the rib-bearing thorax. This illustration offers a direct read on how the superior articular facet forms the superior half of the zygapophyseal joint line, a relationship that becomes clinically concrete in thoracic facet arthropathy, post-traumatic malalignment, and when targeting the medial branches of the dorsal rami for diagnostic blocks or radiofrequency ablation. Bony margins and the short, stout thoracic pedicle provide context for instrument trajectories and for interpreting oblique CT reconstructions where facet asymmetry can be subtle. Small structure, large consequences. Common uses include thoracic spine modules in gross anatomy and osteology courses, figure plates for orthopedic or neurosurgical texts discussing facet joint anatomy, and patient-facing diagrams for explaining thoracic back pain attributed to zygapophyseal joint degeneration. The image also supports radiology teaching files that correlate lateral bony landmarks with facet joint spaces on CT and fluoroscopic projections. Anatomical accuracy verified by SciePro's Medical Advisory Board.