What is the purpose of the superior inferior articular facets?
Just so, what is the superior articular facet?
Superior articular facet (facies articularis superior) is a posterior facing, slightly concave surface on the superior articular process. It articulates with the inferior articular facet on the vertebra above.
Considering this, what is the purpose of the facet joint?
The biomechanical function of each pair of facet joints is to guide and limit movement of the spinal motion segment. In the lumbar spine, for example, the facet joints function to protect the motion segment from anterior shear forces, excessive rotation and flexion.
A superior articular process extends or faces upward, and an inferior articular process faces or projects downward on each side of a vertebrae. The paired superior articular processes of one vertebra join with the corresponding paired inferior articular processes from the next higher vertebra.