Figure 4

Fos/FG double labeling after Fluoro-Gold injection into the ventral striatum. A, Schematic figures and digitized photomicrograph showing FG injection site in the ventral striatum and retrograde transportation of FG to label neurons in the ACC. B, Distribution of FG labeled neurons in both sides of ACC with FG injection into the ventral striatum. C-D, Augmented figures showing FG (green) and Fos (red) double-labeling results in rectangle area 1 (C) and 2 (D) in B. Arrowheads on the merged figures indicate FG/Fos double-labeled neurons. Bars equal to 1000 μm in A, 200 μm in B, and 20 μm in C and D.