FOS and Anxiety: To assess the effect of glyphosate on the brain circuitry of anxiety and fear, we performed c-Fos immunohistochemistry, to measure cellular activity, on brain slices containing the prelimbic (PL) and infralimbic (IL) cortices of the medial prefrontal cortex, the bed nucleus of the stria terminalis (BNST), and the basolateral (BLA) and central (CeA) amygdala.