Chapter 6 – EEG imaging 207 Z = 3.05, p = 0.0023) (Fig. 3e). There were no significant differences in relative power gamma between nocebo and control trials after multiple comparisons correction (Z = -1.53, p = 0.13) (Fig. 3f, g). There were no significant differences in LRTC between nocebo and control trials within alpha (Z = -0.35, p = 0.73), beta (Z = -0.79, p = 0.43) and gamma bands (Z = -1.43, p = 0.15) after multiple comparisons correction (Fig. 3h-k). We then asked whether neurophysiological changes in spectral power were also observed during the evocation phase of the study. No significant differences were observed between nocebo and control trials in the evocation phase (supplementary material). Figure 3. Oscillatory power of alpha and beta oscillations is suppressed during conditioning of nocebo hyperalgesia. (a) An EEG signal consists of brain oscillations with
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