Full T1 (1st Thoracic Vertebra) Description
[Continued from above] . . . resembling the C7 cervical vertebra. It has a fairly cylindrical and broader centrum or ventral body with a concave upper surface, long transverse processes, and a larger, nearly horizontal spinous process. Otherwise, it is entirely like the T2-T9 vertebrae, which are often grouped together. The T1 helps support and articulate the first rib and second rib on each side of the body with a demi-facet on the lower portion for the second rib and a complete articular facet atop the exterior of the centrum where the first rib's head connects.