Figure 1.

Regions within coronal rat sections used for autoradiographic binding and in situ hybridization. (A–D) Solid gray polygons outlined in black depict cortical subregions quantified: cingulate [(A,B) solid line], motor [(A,B) short dashed line], and auditory [(C,D) long dashed line]. (C,D) Hippocampus is enlarged to delineate subregions, where black lines depict: dentate gyrus (solid line), cornu ammonis field 3 (short dashed line), and cornu ammonis field 1 (long dashed line). Shaded regions indicate levels quantified for binding data: afferent (dark gray; molecular layer, stratum radiatum) and efferent (light gray; polymorph layer, stratum oriens). (A,B) Empty black outlines depict striatal subregions quantified: dorsal striatum (solid line), nucleus accumbens core (short dashed line), and nucleus accumbens shell (long dashed line). Text in gray indicates Bregma level of section. Adapted from Paxinos and Watson sixth edition Rat Atlas (41).