Fig. 2: Results from pain testing.

A Boxplots (including median, interquartile range, and upper and lower adjacent values) of heat pain threshold, heat pain tolerance, and pressure pain threshold. B Mean pressure pain threshold during CPM procedure and CPM effect (error bars represent 95% confidence interval). C Mean pain ratings during repeated stimulation in the temporal summation procedure. Abbreviations: CPM conditioned pain modulation, CS conditioning stimulus. *P < 0.05, **P < 0.01, ***P < 0.001.