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Figure 9. Efferent connections from the raphe nuclei (serotonin; A) and from the locus ceruleus and medullary reticular formation (norepinephrine; B).  RN = raphe nuclei; BS = brain stem; Th = thalamus; S = septal nuclei; HC = hippocampus; Amy = amygdala; H = hypothalamus; LC = locus ceruleus; RF = reticular formation.