Electroencephalography-Based Effects of Acute Alcohol Intake on the Pain Matrix

Figures

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  Figure 1. Median VAS values of our standardized noxious stimulations in the different groups and conditions. The upper boxplots represent the VAS values following CHEPS and the lower boxplot the VAS values following PEP.

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  Figure 2. Eventrelated data following noxious contact heat stimulation (CHEPS) as spectral perturbation (ERSP). The gray shaded areas in the statistics panels indicate a response, i.e., either one of the areas in the respective ERSP patterns exceeded −2/2 dB; statistics were only calculated for those areas. Areas of interest for further analysis highlighted with a black arrow (early low-frequency response). A colored pixel in the statistics image indicates statistical significance; the color value according to the c-axis indicates the AUROC effect size. The EEG data are shown at electrode location Cz. A0 and P0 and A1 and P1 represent block 0 and 1 in the alcohol (A) and placebo (P) groups, respectively.

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  Figure 3. Event-related data following noxious pinprick stimulation (PEP) as a spectral perturbation (ERSP). The gray shaded areas in the statistics panels indicate a response, i.e., either one of the areas in the respective ERSP patterns exceeded −2/2 dB; statistics were only calculated for those areas. Areas of interest for further analysis highlighted with a black (early low-frequency response) and whihte arrow (late high-frequency response). A colored pixel in the statistics image indicates statistical significance; the color value according to the c-axis indicates the AUROC effect size. The EEG data are shown at electrode location Cz. A0 and P0 and A1 and P1 represent block 0 and 1 in the alcohol (A) and placebo (P) groups, respectively.