Figure 1. Experimental task, behavioral data, and topographic mapping. A, Trial schematics of memory-guided prosaccade and antisaccade tasks. The dashed square depicted during the delay epochs represent the saccade goal, but were not visible during the task. B, Neither SRTs nor saccade errors differed significantly between the tasks. Error bars show SEM across subjects. C, Definition of retinotopic visual areas projected onto flattened occipital-parietal patches from an example subject. The colors depict the phase estimates from the localizer task that mapped the polar angle within a ring 9–11° in the periphery where saccades were planned in the saccade tasks. LH, Left hemisphere; RH, right hemisphere; UVM, upper visual meridian; LVM, lower visual meridian; LHM, left horizontal meridian. D, Delay period data extracted from retinotopic ROIs mapping quadrant bands were sorted into four trial types according to the quadrant into which the saccade was planned. We compared trials in which the saccade plan was directed into the part of the visual field mapped by the topographic ROI (In, green) with trials in which it was directed into other visual field quadrants [i.e., the mirror image location in the opposite hemifield (red), the adjacent quadrant in the same hemifield (magenta), and the diagonal quadrant (blue)]. The example shown depicts a left hemisphere ROI that maps the contralateral upper visual field quadrant.