Influence of memory on experienced pain during Virtual Reality analgesia

Abstract

Virtual Reality (VR) technology can be applied during pain treatment, acting as an effective distractor from pain stimuli. In our paper we investigate how memory influences experienced intensity of thermal pain stimuli. An experiment (within subject design) was conducted on 35 students from various Wroclaw universities. A cold pressor test was used for pain stimulation. Participants were immersed in customized virtual environments, created for this particular study. The environments differed at the level of memory engagement while playing a game. Pain measures were determined by the length of time participants kept their hands in cold water (pain tolerance), and their pain rating intensity was measured on the VAS scale (pain intensity). Participants were asked to put their hand in a container with cold water and keep it there until the pain became difficult to bear.In both VR conditions participants kept their hands in the cold water significantly longer than in a non-VR (control) condition. Results of pain intensity measures were in conclusive. We did not find any significant differences in effectiveness in the virtual environments that were used.