Fig. 3. Schematic representation of regions analyzed.Numbers at the top left of each section represent the distance (in millimeters) from bregma.Numbers in the sections represent the regions (area in square millimeters) analyzed as follows: 1, dorsal caudate putamen, 0.135; 2, anterior cingulate, 0.135;3, NAc core, 0.135; 4, NAc shell, 0.1;5, ventral pallidum, 0.09; 6, lateral septal nucleus, 0.09; 7, motor cortex, 0.125;8, lateral amygdala, 0.09; 9, central amygdala, 0.134; 10, basolateral amygdala, 0.134;11, cortical amygdala, 0.09; 12, medial amygdala, 0.09; 13, lateral hypothalamus, 0.09; 14, arcuate nucleus, 0.05; 15, dentate gyrus, 0.1;16, central gray area, 0.07; 17, hippocampal CA3 region, 0.1; 18, hippocampal CA1 region,19, entorhinal cortex, 0.125; 20, ventral subiculum, 0.1; 21, substantia nigra pars compacta, 0.6;22, substantia nigra pars reticulata, 0.07;23, VTA, 0.07. Drawings were adapted from the Paxinos and Watson atlas (1986).