For example, there is a loss of interneurons in the BLA associated with epilepsy (Callahan et al., 1991; Tuunanen et al., 1996; Pitkanen et al., 1998; nicely reviewed in Aroniadou-Anderjaska et al., 2008), including interneuron subtypes other than PV interneurons, such as SST interneurons (Sperk et al., 1986; Tuunanen et al., 1997; Pitkanen et al., 1998). This evidence concerns the gene SST and epilepsy.