Visual Feedback Manipulation in Virtual Reality Alters Extension-evoked Pain Perception in Chronic LBP

This study investigates the potential to modify movement-evoked pain in individuals with chronic low back pain (LBP) by manipulating visual proprioceptive feedback through virtual reality (VR). Fifty patients with non-specific chronic LBP are planned to participate. Participants perform lumbar spine extension until pain onset under three conditions: accurate visual feedback (control), feedback showing 10% less movement (E-), and feedback showing 10% more movement (E+). Lumbar range of motion (ROM) is measured using a 3-space Fastrack motion analysis system. The study also explores whether individuals with higher pain levels, kinesiophobia, disability, or catastrophising are more susceptible to VR feedback manipulation. Pain thresholds, pain intensity, kinesiophobia, disability, and catastrophising levels are assessed.