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. 2015 Apr 20;9:96. doi: 10.3389/fnbeh.2015.00096

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Copyright © 2015 Gärtner, Grimm and Bajbouj.

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) or licensor 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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Frontal midline theta increases during mental arithmetic in the stimulus-locked time window. Cluster dimensions in the electrode-time-frequency space for pooled, neutral and stress conditions. (A–C) Show event-related synchronization (ERS) compared to a pre-stimulus baseline period (−1000 to 0 ms) in dB. (A) Shows the cluster dimensions in the electrode space. (B) Shows the cluster dimensions in the time-frequency space. (C) Shows the time course of the ERS. (D) Shows the distribution of random clusters in the cluster-based permutation test. The red line marks the position of the observed cluster.