Lateral Perspective of the Costal Facets of the Vertebrae

Description

Oriented in lateral profile, two adjacent thoracic vertebrae are shown with the intervertebral disc interposed, while the costal facets are highlighted as smooth articular surfaces on the posterolateral vertebral bodies (superior and inferior demifacets) and on the transverse processes (transverse costal facets). The vertebral arches extend posteriorly to the spinous processes, and the transverse processes project laterally, placing the costotransverse joint surface lateral to the pedicle and posterior to the vertebral body. Blue accenting differentiates hyaline cartilage covered joint surfaces from surrounding cortical bone. Relationships are clean and easy to read. Costal facets matter because they define the rib-bearing region of the spine and the mechanics of the thoracic cage: the head of the rib engages the demifacets across an intervertebral disc, while the tubercle of the rib meets the transverse costal facet to form a paired synovial articulation. Small changes at these surfaces drive common problems, including costovertebral and costotransverse osteoarthritis with focal pain near the paraspinal line, and reduced rib excursion in ankylosing spondylitis. The lateral perspective also supports procedural planning, since thoracic facet and medial branch blocks, as well as some paravertebral and costotransverse ligament approaches, rely on understanding what sits anterior versus posterior to the transverse process. Use this illustration in thoracic spine and thoracic wall modules for gross anatomy, kinesiology of respiration teaching, or radiology correlation when explaining how these joints appear on CT and why they are often obscured on plain films. It also fits surgical anatomy texts discussing posterior thoracic approaches where the transverse process and its rib articulation function as palpable, imageable landmarks. Anatomical accuracy verified by SciePro's Medical Advisory Board.