Figure 8.

Retrograde labeling of vPAG dopaminergic neurons after injections of CTB into axonal targets. Double labeling of retrograde tracer CTB (first panel in each pair) and TH immunoreactivity (second panel in each pair) in cells in the vPAG after CTB injection in the medial prefrontal cortex (A, A′), the midline paraventricular thalamus (B, B′), the intralaminar thalamus (C, C′), the VLPO (D, D′), the perifornical area (E, E′), the substantia innominata (F, F′), the LDT (G, G′), and the locus ceruleus (H, H′). Arrows point to double-labeled cells. Scale bar: (in E′) A–H′, 100 μm.