Within the CeA, CB1 mRNA expression has generally been described as low but present (Matsuda et al., 1993; Marsicano and Lutz, 1999; Chhatwal et al., 2005; Hermann and Lutz, 2005). It is, however, unclear from these studies if there are differences in CB1 mRNA expression within subregions of the CeA (Chhatwal et al., 2005).
