THE EFFECT OF LOADING RATE AND DEGENERATION ON NEUTRAL REGION MOTION IN HUMAN CADAVERIC LUMBAR MOTION SEGMENTS

摘要

BackgroundThe quasistatic neutral zone is a surrogate for neutral region stiffness of spinal motion segments. No similar measure of dynamic stiffness has been validated. Because parameters related to stiffness are likely to be affected by loading rate and disc degeneration, we examined the effect of those factors on motion parameters derived from continuous motion data.