Fig. 5.

Effects of intra-ovBNST DA D1 receptor blockade on conditioned suppression responding. a Drawing showing correct intracranial cannulae placements for rats receiving 0.8 µg/µl SCH-23990 infusions. For clarity, each bilateral infusion is represented unilaterally (total n = 32) and infusions in the 12 h sucrose consumption group are identified with X (n = 8). b Conditioned suppression (CS) ratios and c latency to lever press during CS testing for rats in different access groups following ovBNST infusions of SCH-23990 or saline. CS ratios were calculated as (total CS-on lever presses/total CS-on + total CS-off lever presses). The vertical line at 0.5 represents consistent responding across CS-on and CS-off phases or a lack of conditioned suppression. *Values significantly lower than this value of 0.5, p < 0.05