Intrinsic inputs from the basolateral complex to the central nucleus (modified with permission from Pare et al (2003). The intercalated islands (gray dots) serve as feed forward inhibitors of excitatory inputs from the basolateral complex to the central nucleus. The central nucleus, and the intercalated islands which modify its inputs, are both densely innervated by 5-HTT. Open circles/triangles are excitatory circuits; closed circles/triangles are inhibitory. CeM, central nucleus, medial subdivision; M, medial nucleus; Abmc, accessory basal nucleus, magnocellular subdivision; CeL, Central nucleus, lateral core subdivision; Str, striatum; Bmc, basal nucleus, magnocellular subdivision.