Figure 2. Neural markers of visibility.

(A) Topographical representation of overall activity engendered by HV (top row) and LV (middle row) arrows, as well as differences in activity between them (bottom row). Activity (differences) is shown at five intervals after the onset of the arrow, from 50–300 ms. Dots indicate significant clusters of larger activity for HV than LV stimuli (p<0.05, corrected for multiple comparisons). (B) Time course of fronto-central (left panel), parietal (middle panel), and occipital (right panel) clusters for HV and LV arrows. Time course of frontal activity was plotted for all sensors with significant differences in the 50–100 ms interval, the parietal activity time course for the significant parietal sensors in the 100–150 ms interval, and occipital activity for the significant occipital sensors in the 150–200 ms interval. The dotted lines and numbers indicate the latency (in ms) at which differences between conditions first became significant.