Adapted schematic of coronal brain sections showing regions of interest analyzed (Paxinos and Watson 2006): 1 dorsolateral prefrontal cortex (dl PFC), 2 medial prefrontal cortex (m PFC), 3 pole of the nucleus accumbens shell (Pole AcbS), 4 pole of the nucleus accumbens core (Pole AcbC), 5 nucleus accumbens core (AcbC), 6 nucleus accumbens shell (AcbS), 7 olfactory tubercle (OT), 8 rostral dorsolateral caudate putamen (rost dl CPu), 9 rostral dorsomedial. caudate putamen (rost dm CPu), 10 rostral ventrolateral caudate putamen (rost vl CPu), 11 rostral ventromedial caudate putamen (rost vm CPu), 12 middle dorsolateral caudate putamen (mid dl CPu), 13 middle dorsomedial caudate putamen (mid dm CPu), 14 middle ventrolateral caudate putamen (mid vl CPu), 15 middle ventromedial caudate putamen (mid vm CPu), 16 ventral pallidum (VP), 17 dorsal tail of the caudate putamen (d CPu tail), 18 ventral tail of the caudate putamen (v CPu tail). Measures on the top left of each section indicates approximate distance from bregma.