Lamina Of The Thoracic Vertebrae, Superior View

Description

Thoracic vertebral laminae form paired plates of the vertebral arch that converge in the posterior midline to meet at the base of the spinous process. From a superior perspective, the vertebral canal sits centrally, bordered anterolaterally by the pedicles and posterolaterally by the laminae as they slope toward the midline. Lateral to the lamina-pedicle junction, the superior articular processes and their facets are positioned posterior to the vertebral body, helping define the posterior wall of the thoracic spinal canal. Bone contours. Surgical corridors through the posterior thoracic spine depend on an exact understanding of laminar thickness, the interlaminar space, and the relationship of lamina to the spinous process and facet joints, because these landmarks guide thoracic laminectomy, laminotomy, and posterior decompression for canal stenosis or ossification of the ligamentum flavum. Pedicle screw placement planning also benefits from seeing how the lamina transitions into the pedicle and transverse process region, a common site where fractures propagate in high-energy trauma. The fixed superior viewpoint makes it easy to orient posterior elements without distraction from anterior vertebral body anatomy. Use this illustration in gross anatomy lab manuals, orthopedic and neurosurgery teaching decks, and radiology correlation materials when explaining how CT axial slices traverse the posterior vertebral arch and why hypertrophy at the lamina and facet joints can narrow the thoracic spinal canal. It also supports spine conference figures for posterior decompression techniques and for documenting levels in operative reports. Anatomical accuracy verified by SciePro's Medical Advisory Board.