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Difference waveforms obtained during the 700 ms cue-target interval at anterior (top panel) and posterior (bottom panel) lateral electrode pairs in the Covert task (black solid lines), the Saccade task (black dashed lines), and the Combined task (grey solid lines). Enhanced negativities contralateral to the cued side are reflected by positive values (downward deflections), and enhanced contralateral positivities are reflected by negative values (upward deflections).
