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T9 (9th Thoracic Vertebra)

Last Updated: Jun 24, 2015

The T9 vertebra is one of the lowest positioned of the twelve (12) thoracic vertebrae, and thus one of the largest. While the T2-T9 vertebrae are often linked descriptively, the T9 vertebra has certain particularities. Instead of two costal demi-facets (superior and inferior) on the exterior of the centrum, it typically has a single superior costal demi-facet above, which together with facets on the Continue Scrolling To Read More Below...

Continued From Above... transverse bodies provides articular spaces for the tubercular heads of the connecting ribs. Otherwise, the T9 greatly resembles the T2-T8 vertebrae in having a centrum (ventral body) in the shape of a heart, with flat articular surfaces above and below, creating a joint with the T8 vertebra above and the T10 below, with cartilaginous intervertebral discs between to cushion the joints and provide support to the spine. The T9 has a smaller (and circular) vertebral foramen than the vertebrae above it. Its laminae are large and overlap with the T10 vertebra.