High-Frequency EEG Variations in Children with Autism Spectrum Disorder during Human Faces Visualization

Figure 7

ERSP of (a) and (c) O1 and (b) O2 electrodes for the total mean of the samples of the happy (a) and (b) and neutral (c) faces signals in the interval of 3 seconds (plus a basal activity of 500 ms before the event) for the ASD and control groups that showed significant spectral perturbations. In the ERSP image, the upper panel presents the ERSP (Event-Related Spectral Perturbation) data in dB, with mean baseline spectral power (in dB) subtracted at each time in the epoch. The upper left marginal panel presents the mean spectral power during the baseline period (blue). The marginal panel under the ERSP image shows the maximum (red) and minimum (blue) ERSP values relative to baseline power at each frequency.

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