Which of the following structures would be best suited to resist the tensile forces produced during spinal extension?
a. Posterior vertebral body
b. Posterior longitudinal ligament
c. Anterior longitudinal ligament
d. Facet capsule
ANS: C
During extension of the spine, the posterior vertebral body and facet joint surfaces would have a
compressive force placed on them. This compressive force would not affect the facet joint capsule.
The posterior longitudinal ligament would become slack, and the anterior longitudinal ligament
would be the only structure listed above to resist the tensile force being produced by an extension
motion.
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