Figure 4

Effects in fNIRS data. (A) Brain maps of the contrast during the anticipation phase. Warm colors reflect higher O₂Hb levels during the spider condition in comparison to the control condition. Differences are plotted in effect size Cohen’s d. (B) Hemodynamic response of the mean of DLPFC and SPL in HC (left) and PP (right) in the control condition (blue line) and spider condition (red line) (upper images) and the contrast (spider-control) (lower images). Horizontal shadings in blue mark the anticipation phase, red shadings mark the confrontation phase. Shadings around the hemodynamic curves reflect standard errors of the mean. Note that the huge hemodynamic responses at the end/beginning of each trial are due to the behavioral ratings. Therefore, O₂Hb levels at the start of each trial were negative as the baseline included the 15 s before each trial; 0 s on the x-axis marks the beginning of the trial. The scaling represents z-standardized scores.