Optokinetic stimulation increases limb pain and forehead hyperalgesia in complex regional pain syndrome

摘要

BackgroundAmbiguous visual stimuli increase limb pain in patients with complex regional pain syndrome (CRPS), possibly due to afferent sensory feedback conflicts. Conflicting sensory stimuli can also generate unpleasant sensations in healthy people such as during motion sickness. We wanted to investigate the mechanisms underlying the link between sensory conflicts and pain in CRPS using optokinetic stimulation (OKS) - a method known to induce motion sickness.