Pleasant Pain Relief and Inhibitory Conditioned Pain Modulation: A Psychophysical Study

Figure 1

Inhibitory conditioned pain modulation. This figure shows the pain perception of participants during both administrations of the test stimulus for 2 minutes (120 seconds). Pain perception during the test stimulus was evaluated twice, once before (in dark blue) and once after (in pale blue) the administration of the conditioning stimulus. Each time point shows the mean and SEM.