The effect of the D1 antagonist SCH23390 (A,B) and the D2 antagonist raclopride (C,D) injection in the core (A,C) and the shell (B,D) on COS consumption during the first quarter of the session (left) and the last 3 quarters of the session (right) for the IA (black), WA (white) and CA (grey) groups.
*, **, ***: significant difference from the WA group (p < 0.05, 0.01, 0.001).
$, $$, $$$: significant difference from the CA group (p < 0.05, 0.01, 0.001).