Figure 10.

Comparison of the strength of suppression with different surround characteristics. Bars on the left indicate percent signal change in BOLD response for the central region of stimulus in the unifocal (gray) and the four different multifocal (white) conditions of Experiment 3. Bars on the right are corresponding suppression indices for different multifocal surround configurations relative to the unifocal condition. Data is pooled over all eight subjects, and error bars denote SEM. Asterisk indicates statistically significant difference in BOLD signal change (P < 0.05) when Coll‐SameSF is tested against the mean of other three multifocal conditions. Suppression is strongest when both orientation and spatial frequency of center and surround are matched.