Figure 4.
Reproducibility of the evoked activity in response to scotopic stimuli across two scan sessions. The upper panels show two activity maps from one subject, both evoked by the scotopic stimuli, acquired 60 days apart. Each session included 1200 functional volumes (see Methods). In both maps, minimum and maximum thresholds are set to P = 10–2.5 and P = 10−5, respectively. Borders of the retinotopic visual areas (black dashed lines) were defined based on the subject’s own functional data, acquired in a separate scan session (see Methods). The lower three panels show the correlation in activity across these two sessions, from all surface vertices within area V2 (red; left panel), V3 (green; middle panel) and V4 (cyan; right panel). Each dot represents the activity in one vertex across two different sessions. The correlation r-values are furnished in the bottom right corner of each scatter plot.