Figure 5. Interruption of Target-Evoked Activity by Mask Presentation.

Mask-subtracted ERPs from occipito-temporal electrodes, averaged across right and left hemifields of stimulus presentation, are represented aligned respectively on target onset (left panel) and mask onset (right panel). The N2 component shows a common onset for all SOA conditions when ERPs are aligned on target onset, and a common offset when ERPs are aligned on mask onset. Thus, the N2 may reflect a process that starts with target onset and is interrupted by the mask.