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. 2017 Oct 17;11:573. doi: 10.3389/fnins.2017.00573

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Copyright © 2017 Di and Biswal.

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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Psychophysiological interaction (PPI) results for the right middle occipital gyrus (RMOG) seed during checkerboard presentation in the two runs of TR (repetition time) 645 ms and TR 1,400 ms. The resulting clusters were thresholded at p < 0.001 (approximated t = 3.15), with DF (degree of freedom) of 137. The last row illustrates the number of overlapped negative PPI results in the four scenarios. Numbers on the bottom represent z coordinates in MNI (Montreal Neurology Institute) space.