Thoracic Spine, Posterior View

Description

Centered on the posterior thoracic vertebral column (T1 to T12), the spinous processes form a midline ridge while the laminae and transverse processes project posterolaterally toward the rib heads and tubercles. Between adjacent vertebrae, the superior articular processes and their facets sit superiorly and slightly posterior to the inferior articular processes, defining the paired zygapophysial (facet) joints along the posterolateral margin of the vertebral arch. Ribs articulate laterally at the costovertebral and costotransverse joints, framing the thoracic spine and clarifying segmental relationships across the ribcage. The superior pelvis appears inferiorly as a positional reference for the thoracolumbar junction. Facet orientation in the thoracic region, generally closer to the coronal plane than in the cervical or lumbar spine, biases motion toward axial rotation and limits flexion and extension, a point that is easy to teach in a posterior view. Degenerative change of the zygapophysial joints, including osteophyte formation and capsular hypertrophy, contributes to thoracic back pain and can narrow the intervertebral foramina where the thoracic spinal nerves exit. This perspective also aligns with the procedural anatomy for thoracic medial branch blocks and radiofrequency ablation, where the target nerves course along the junction of the transverse process and superior articular process. Ideal for gross anatomy and musculoskeletal modules covering the vertebral column and rib articulations, this asset also suits anesthesia and pain medicine teaching files illustrating facet-mediated pain pathways and posterior bony landmarks for fluoroscopic guidance. Publishers will find it useful in atlas plates contrasting regional facet joint morphology across the cervical, thoracic, and lumbar spine. Anatomical accuracy verified by SciePro's Medical Advisory Board.