part of part of Homo sapiens thoracic vertebra 1 thoracic vertebral arch vertebral arch of first thoracic vertebra 2026-03-19T00:00:00Z A neural arch forming the posterior bony ring of the first thoracic vertebra, consisting of paired pedicles and laminae that together with the vertebral body enclose the vertebral foramen. It bears the transverse processes with costal facets, the superior and inferior articular processes, and a long inferiorly directed spinous process, providing attachment for deep back muscles and spinal ligaments. David Osumi-Sutherland