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. 2018 Nov 20;9:2117. doi: 10.3389/fpsyg.2018.02117

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Copyright © 2018 Sliva, Black, Bowary, Agrawal, Santoyo, Philip, Greenberg, Moore and Jones.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The tactile stimulus-evoked response differs on perceived and non-perceived trials. (A) Grand average EEG (C3 electrode) evoked responses (±SEM) following delivery of the tactile stimulus (t = 0) for all trials during the pre-tACS time block. Black arrow indicates the prominent peak ∼100 ms post-stimulus (minimum value between 92–108 ms, 98.5 ± 0.15 ms). (B) Peak values ∼100 ms were significantly higher on perceived (“hit”, above in blue) than non-perceived (“miss”, above in red) trials across subjects [left, Wilcoxon signed ranks test (WSR), ^∗p < 0.05]. The mean slope from ∼70 ms (peak value between 60 and 90 ms, 74 ± 1.6 ms) to ∼100 ms was also significantly larger on perceived (blue, “hit”) than non-perceived (red, “miss”) trials (right, WSR, ^∗p < 0.05). Only data from pre-tACS block is included in this analysis.