Figure 1

Axial slices of the left hemisphere showing the grand average responses over the 21 subjects within the time window [2 s, 18 s] from stimulus onset from top of the head to bottom in 10 mm intervals. Warm colors (yellow) indicate an increase in total hemoglobin (HbT) and cool colors (blue) indicate a decrease in HbT in response to the stimulus averaged in the 2 s to 18 s post stimulus onset time window. The scalp and skull are shown in dark gray. White line surrounds gray matter voxels within the field of view which are positive at least for one stimulus condition.