Fig. 3.

Illustration of the D2R (in green) single immunofluorescence studies in the caudate putamen (CPU), claustrum (Cl) and in the dorsal endopiriform nucleus (DEn) of the rat brain. Microphotographs from coronal sections of rat brain at Bregma ( + 1.00 mm) level. A low density of punctate D2R IR (in green), probably located in distal dendrites, is observed together with a few weakly to moderately D2R IR nerve cell bodies within the claustrum and in the DEn where a higher density of punctate D2R IR were found in the caudate putamen. Images are representative for the three rats studied. The nuclei are shown in blue by DAPI. Scale bars are shown. Cl Claustrum, CC corpus callosum, DEn dorsal endopiriform nucleus, CPU caudate putamen (Color figure online)