Oxytocin may, e.g., induce wellbeing by stimulation of dopamine release in the nucleus accumbens (NA) (Insel, 2003), increase social interaction and decrease anxiety by actions in the amygdala (Amico et al., 2004), decrease stress reactions by actions in the hypothalamic-pituitary—adrenal axis (HPA-axis) (Petersson et al., 1999b; Neumann, 2002) and by decreasing noradrenergic release in the locus coeruleus (LC) (Petersson et al., 1998b) and nucleus tractus solitarius (NTS) (Petersson et al., 2005a). This evidence concerns the gene OXT and Anxiety.