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Psychophysiological interaction (PPI) results for the left middle occipital gyrus (LMOG) 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.
