Interaction Between the Porcine Lumbar Intervertebral Disc, Zygapophysial Joints, and Paraspinal Muscles

Introduction of physiologic saline into the zygapophysial joint reduced the stimulation pathway from the intervertebral disc to the paraspinal musculature. The zygapophysial joints may therefore have a regulating function, controlling the intricate neuromuscular balance in the lumbar motion segment.