Fig. 8From: Effects of chiropractic spinal manipulation on laser-evoked pain and brain activityModulation of C-fiber-evoked potentials. a Boxplot of the difference in C-fibers N2 amplitude. b Boxplot of the difference in C-fibers P2 amplitude. PRE values were subtracted from POST values. A negative score reflects inhibition. No significant effect was observed between groups. Data from each participant are represented by black circlesBack to article page