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. 2017 Aug 9;8:384. doi: 10.3389/fneur.2017.00384

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Copyright © 2017 Hohenfeld, Nellessen, Dogan, Kuhn, Müller, Papa, Ketteler, Goebel, Heinecke, Shah, Schulz, Reske and Reetz.

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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Procedures. The figure summarises the procedures of the experiment. The experiment started with the pre-test on T1 and the illustrated procedure. T2–T4 included the neurofeedback training, which is displayed with more detail. Each training session started with the functional localiser in which the feedback stimulus was shown, but no feedback was given. It was used to select a region of interest (ROI) in the left parahippocampus as feedback source for the training. Feedback was shown during the three subsequent training runs. The background colour of the stimulus indicated the task with it being counting backwards at yellow and recalling the path from T1 at green. After the three training days, at T5 the post-test took place. The interval between all training days was usually 2–7 days.