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. 2013 Oct 19;3:522–530. doi: 10.1016/j.nicl.2013.10.009

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© 2013 The Authors

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-No Derivative Works License, which permits non-commercial use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig. 1 — Moving average filter method was used to calculate the NPV. The NPVs of 2.56-s EEG segments were calculated advancing at 0.64-s steps for 500 s EEG segment. Then, all NPVs were averaged. Top line represents EEG time course, while lower lines represent 2.56-s EEG segments.