Define facet joint dysfunction.

Define facet joint dysfunction.

• A. Dysfunction of the sacroiliac joint causing pelvic pain.
• B. Dysfunction of the anterior longitudinal ligament causing instability.
• C. Dysfunction of the intervertebral disc causing central pain.
• D. Dysfunction of the zygapophyseal joints causing axial spine pain and restricted motion, often with paraspinal guarding.

Answer: (D)