Neurogenesis in the area postrema of the intact nestin-GFP mouse. Shown are BrdU-labeled cells co-expressing the early neuronal marker TUC-4 within the boundary of the AP (B, arrowhead), in the dorsal vagal complex (DVC, B, arrow), and in the rostral migratory stream, a known region of migrating neuroblasts (RMS, A). BrdU-labeled cells in the AP also express the neuronal marker NeuN (C, arrow). Scale bar = 50 μm.