Transverse Process Of The Thoracic Vertebrae

Description

Transverse processes of the thoracic vertebrae project laterally from the junction of pedicle and lamina, forming stout bony struts that sit posterolateral to the vertebral body. Along the anterior aspect of the process, a smooth costal facet (transverse costal facet) is visible as a shallow, polished surface oriented to meet the tubercle of the corresponding rib, placing the costotransverse joint just lateral to the spinal canal. Posteriorly, the process blends into the lamina near the superior and inferior articular processes, while its tip extends laterally toward the posterior thoracic wall. Bone texture and contour are emphasized. No soft tissue obscures the landmark. That transverse costal facet matters because it is the bony half of the costotransverse articulation, a common pain generator in thoracic facet and rib dysfunction and a target for diagnostic injection. In posterior thoracic approaches, the transverse process provides a dependable depth stop and orientation point when working toward the paravertebral space, and its relationship to the rib tubercle helps learners distinguish costotransverse joints from the costovertebral joints at the vertebral body. The fixed lateral emphasis clarifies why thoracic transverse processes differ from cervical and lumbar levels, and why T1 to T10 typically bear rib facets while T11 and T12 do not. Use this illustration in gross anatomy teaching of the thoracic cage, rib articulations, and vertebral osteology, or in radiology correlation for CT-based identification of the costotransverse joint and transverse process fractures. It also fits operative anatomy figures for pedicle screw planning, thoracic decompression, and regional anesthesia references that require an unambiguous bony landmark without distraction from muscles or pleura. Anatomical accuracy verified by SciePro's Medical Advisory Board.