Compare the mobility-stability of the cervical (C2 to C7) and thoracic regions, including the structures implicated
What will be an ideal response?
ANS: The thoracic region, in general, is more stable and less mobile than the cervical region. In the
thoracic region, additional bony checks to motion are provided by the long, downwardly pointing
spinous processes (extension) and the ribs (lateral flexion). Additional checks in the thoracic
region are provided by the tighter facet joint capsules. The facet joints in the thoracic region are
very oriented to the frontal plane, enhancing lateral flexion but restricting flexion-extension. The
cervical facets allow more freedom in all directions. The thoracic region is less mobile because it
has a less favorable disc-to-body height ratio.
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