Figure 3. Summary diagram of the ascending primate serotonergic system. The DRN (main part is red and the intrafascicular part is shown in turquoise) and the central superior nucleus (the ventral part in yellow corresponds to MRN) are shown. The fiber pathways are shown in color. Abbreviations: AC, anterior commissure; Am, amygdaloid nuclei; CC, corpus callosum; CQ, corpus quadrigemini; Csul, central sulcus; DG, dentate gyrus; DRCT, dorsal raphe cortical tract; DRN, dorsal raphe nucleus; F, fornix; F.Ctx, FCII, frontal cortex; Hipp, hippocampus; IC, internal capsule; IP, interpeduncular nucleus; LC, locus coeruleus; MB, mammillary body; MFB, medial forebrain bundle; MRN, median raphe nucleus; OB, olfactory bulb, P, pons; S, septum; SM, stria medullaris; SN, substantia nigra; STC, superior temporal cortex; T, thalamus; T.Ctx, temporal cortex; VAFP, ventro amygdalofugal pathway. (Reprinted, with modification, from ref. 13).