Fig. 3

Significant clusters of the differences in the evoked source current between test (periodic vowel, non-periodic vowel, periodic non-vowel) and control (nonperiodic non-vowel) conditions in TD and ASD groups. Blue colors correspond to SPN, i.e. a more negative source current to the test compared to the control condition, red colors—to the opposite direction of the difference. Color intensity indicates the duration of the cluster. Black line indicates the border of the region used for cluster analysis. Note that the 798 ms point is the last time point analyzed