FIGURE 2 | Processing of deviant angry or happy stimulus in the oddball (two left panels) and optimum (two right panels) experiment as compared to processing of the same stimulus as standard in the other experimental session. The dotted line is the averaged activity when processing of the standard, the broken line is for the deviant and the solid line is the difference wave (vMMN, deviant – standard). Graphs represent results from three pooled sites (frontal,