Figure 5. Direct comparison of fixation target and saccade target EPs.

In contrast to figure 4, when saccade target and fixation target EPs are compared directly, significant differences are observed between the saccade and fixation conditions, likely due to EOG and EEG saccade-related activity present in the saccade but not the fixation condition. A, Grand average across subjects of fixation and saccade target responses at midline electrodes Fz, Cz, Pz and Oz. Time is measured relative to image presentation (fixation condition) or relative to saccade landing (saccade condition). Time points belonging to clusters of significant difference are highlighted in gray. B, Topographies of target responses in fixation and saccade trials.