Figure 4.

Total food intake (in grams) by the observer mice in the initial 8 h of a 24-h test with intakes being reported over 2 h intervals. (a) Observers that had received no treatment (black circle), saline solution (white circle), SCH23390 at 0.01 mg/kg (black square), 0.05 mg/kg (white square), or 0.1 mg/kg (black triangle) 45 min prior to testing. (b) Observers that had received no treatment (black circle), saline solution (white circle), raclopride at 0.1 mg/kg (black square), 0.3 mg/kg (white square), or 0.6 mg/kg (black triangle) 50 min prior to testing. (c) Observers that had received no treatment, combined from the two pharmacological studies, and were in proestrus (black circle), estrus (white square), or diestrus (black triangle) on the day that testing begun. ^**p<0.001 in the comparison between the raclopride-treated mice (at all three doses) and the saline-treated group.