Figure 6.

Percent of cinnamon (CIN) diet consumed over the total food intake by the female mice that had received no treatment and were exposed to the odor of either a 2% cocoa (COC, black circle) or a 1% CIN (white square) flavored diet for 30 min either individually (a), or while interacting with another female mouse that had just consumed an unflavored diet (b). CIN preferences are shown over an 8 h test at 2 h intervals. In (c), the time (in seconds) that the mice spent investigating the extreme of a cotton swab covered with either a 2% cocoa (COC) or a 1% CIN flavored diet over five tests (T1–T5) with 5 min exposures. Fifteen minutes prior to T1, the mice either received no treatment (white circles), an intraperitoneal injection of saline solution (white triangles), or the D1-type antagonist SCH23390 at 0.1 mg/kg (black square). Over T1–T4, the mice could habituate to one of the two flavored diets. At T5, the mice received the flavored diet to which they had not habituated. ^*p in all three groups, significantly different from both T1 (habituation) and T5 (dishabituation); p<0.01 for the saline and SCH23390 at 0.1 mg/kg groups. p<0.05 for the untreated group.