Articular Facet Of The Tubercle Of The Rib, Inferior View

Description

Tuberculum costae and its facies articularis tuberculi costae occupy the focus of this inferior view, presenting as a small, oval to slightly convex surface on the posterior aspect of a typical rib. From this fixed perspective, the articular facet lies just lateral to the collum costae (neck) and posterior to the corpus costae (shaft), with the nonarticular rough area of the tubercle extending adjacent to it for ligamentous attachment. Medially, the facet aligns toward the corresponding thoracic vertebra’s processus transversus, the bony partner in the articulatio costotransversaria. Costotransverse anatomy matters whenever rib mechanics, thoracic pain, or posterior thoracic procedures enter the conversation, because this joint surface transmits force between rib and vertebra while guiding the posterior rib’s relationship to the spine. Small as it is. Subtle irregularity or loss of congruence at the tubercle can correlate with costotransverse osteoarthritis, inflammatory arthropathy, or trauma near the rib neck, and it is a useful landmark when explaining why fractures at the posterior angle and neck may provoke focal paraspinal tenderness or intercostal neuralgia. The inferior viewpoint reduces distraction from the rib’s broader curvature and keeps attention on the contour of the articular surface and its bordering nonarticular roughness where the costotransverse ligaments anchor. Anatomy faculty often place this illustration into thoracic wall modules, osteology labs, and radiographic anatomy teaching to connect a tiny bony facet with the larger concept of rib-vertebra articulation and thoracic cage stability. It also fits well in surgical anatomy references discussing posterior approaches to the thoracic spine or rib resections, where orientation to the tubercle helps communicate proximity to the transverse process and intercostal neurovascular bundle along the inferior rib margin. Anatomical accuracy verified by SciePro's Medical Advisory Board.