vertebral arch of eleventh thoracic vertebra
A neural arch forming the posterior bony ring of the eleventh thoracic vertebra, composed of pedicles and laminae that enclose the spinal canal at the lower thoracic transitional level. T11 has short, blunt transverse processes that typically lack costal facets; the articular processes show mixed thoracic and lumbar orientation, and the spinous process is shorter and more horizontally directed than at mid-thoracic levels.