Fig. 1.

Increased right amygdala activation in the placebo group associated with the contrast between unmasked fear and unmasked neutral faces and plot of mean percentage blood oxygen level-dependent (BOLD) signal change in this right amygdala cluster after acute oral treatment with citalopram and placebo. Image is thresholded at Z = 2.3, P = 0.05, corrected. Bars show the mean; error bars show the standard error of the mean. Asterisks represent significant level of difference from placebo (^**P<0.01).