FIGURE 2.

Activity in the home cage: single and multiple deliveries conditions. (A) Representative graphs of the activity score of the six rats in the home cage, in the single delivery (s.d.; 2 pellets/rat at 16 h), multiple deliveries (m.d.; 1 pellet/2 rats every 2 h paired with a sonorous tone) and no delivery paradigms (n.d.; sonorous tone every 2 h); events are represent with a colored square; brown, green, and purple, respectively. (B) m.d. condition increased activity scores in the dark period but not in the light period. (C,D) m.d. deliveries condition significantly increased the number of behavioral displays without any evident effect on the dispersion of the groups; in the n.d. activity/displays decreased as the tone association extinguish. (E) Sniffing and chasing significantly increased (number and dispersion) in the m.d. condition. Results are presented as median and IQR; n = 6/group, *p < 0.05, Wilcoxon test.