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. 2019 Jun 12;13:607. doi: 10.3389/fnins.2019.00607

FIGURE 1.

FIGURE 1

Experimental protocol. (A) Binocular rivalry stimulus. A luminance-matched dichoptic grating was presented on a black background. Participants wearing red/green glasses used a keyboard to report perception of stimulus. (B) VEP stimulus. Onset and offset of a black and white checkerboard was presented on a luminance-matched gray background. VEPs were averaged for 3 min at a stimulus frequency of 1 Hz as pre and post measurements. Immediately following the baseline VEP measurement, a tetanization block of stimuli presented at 9 Hz was presented for 2 min. Participants closed their eyes for 2 min before the post tetinization VEPs were recorded.