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. 2015 May 6;9:111. doi: 10.3389/fnbeh.2015.00111

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Copyright © 2015 Kottlow, Schlaepfer, Baenninger, Michels, Brandeis and Koenig.

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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The four TCNs and their activity over the task for high- and low-load conditions. The plots on the right show the t-statistics (across subjects) of the z-transformed TCN percent activity over the mean task conditions for low-load (blue) and high-load (red) conditions and t-test between high- vs. low-load conditions. Y-axes represent t-values and the gray bar represents the significance-threshold. The x-axis represents the time in seconds: −4 to −2.2: pre-stimulus; −2.5 to 0: stimulus; 0 to 3.5: retention; 3.5 to 5.5: probe; 5.5 to 5.8 and −4 to −2.5: pre-stimulus. 0 marks the beginning of the retention period.