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Photomicrographs of c-Fos/Tph-ir-immunostained sections illustrating the four rostrocaudal levels chosen for analysis. All rostrocaudal measurements are in reference to bregma. Abbreviations: Aq, cerebral aqueduct; DRC, dorsal raphe nucleus, caudal part; DRD, dorsal raphe nucleus, dorsal part; DRI, dorsal raphe nucleus, interfascicular part; DRVL/VLPAG, dorsal raphe nucleus, ventrolateral part/ventrolateral periaqueductal gray; mlf, medial longitudinal fasciculus. Scale bar = 250 μm.
