FOS and Anxiety: In line with findings showing the role of amygdala in fear expression and in the onset of anxiety behaviors (Beck and Fibiger, 1995; Ehrlich et al., 2009; Knapska and Maren, 2009; Poulos et al., 2009; Ciocchi et al., 2010; Haubensak et al., 2010; Tye et al., 2011; Mahan and Ressler, 2012; Pare and Duvarci, 2012), we found that the amount of freezing shown by both treated and no treated mice positively correlated with the number of activated neurons (c-fos+) in this region.