Which statement best describes the coupling of rotation and side bending with flexion/extension in facet dysfunction?

Which statement best describes the coupling of rotation and side bending with flexion/extension in facet dysfunction?

• A. They are independent.
• B. They are not affected by facet position.
• C. They are coupled with flexion/extension and restrictions follow the same side rules.
• D. They are always normal.

Answer: (C)

The important idea is that spinal motion is coupled: rotation and side bending occur together with flexion or extension because the facet joints guide and constrain how the vertebrae move. When a facet is dysfunctional on one side, the restriction shows up on that same side across the coupled motions, not as an isolated or normal movement. So, flexion/extension are linked to rotation and side bending, and the limitations align with the involved side. That’s why the best description is that rotation and side bending are coupled with flexion/extension and the restrictions follow the same side rules.

The important idea is that spinal motion is coupled: rotation and side bending occur together with flexion or extension because the facet joints guide and constrain how the vertebrae move. When a facet is dysfunctional on one side, the restriction shows up on that same side across the coupled motions, not as an isolated or normal movement. So, flexion/extension are linked to rotation and side bending, and the limitations align with the involved side.

That’s why the best description is that rotation and side bending are coupled with flexion/extension and the restrictions follow the same side rules.