<prompt> What constitutes a spinal motion segment?A disc and the facet joints at that level.A disc and the vertebrae above and below, including their interlocking facet joints.A section of the spine involved in a physiological curve with the similar function i.e. thoracic kyphosis.A vertebral body and the disc above.  <response>: Ans. B. A disc and the vertebrae above and below, including their interlocking facet joints.A spinal motion segment is made up of a disc with its adjacent vertebrae and their interlocking facet joints devoid of musculature 