Fig. 6From: Electrophysiological investigation of the contribution of attention to altered pain inhibition processes in patients with irritable bowel syndromeModulation of pain perception and NFR amplitude by selective attention and heterotopic noxious counter-stimulation (HNCS). a Pain ratings (mean ± SEM) of the electrical stimulation for each block, session, and group (patients with IBS, left column; control group, right column). For mean values and statistical tests, see Table 2 and “Results” section. The inhibitory effect of HICS and HNCS compared with baseline within each session is represented by the * and † symbols. *p < 0.05, †p < 0.01. The inhibitory effects of HNCS compared with HICS vs. the corresponding changes in the control session is represented by the # symbol. #p > 0.05. X-axis, conditions and sessions; Y-axis, pain ratings of the electrical stimulation. b Standardized NFR amplitude (T-score ± SEM) induced by the electrical stimulation for each block, session, and group (patients with IBS, left column; control group, right column). For mean values and statistical results, see Table 2 and the “Results” section). X-axis, conditions and sessions; Y-axis, standardized amplitude (T-score). NRS: numerical rating scale; SEM: standard error of the mean; IBS: irritable bowel syndrome; HICS: heterotopic innocuous counter-stimulation; HNCS: heterotopic noxious counter-stimulationBack to article page