Fig. 2
Effects of environmental enrichment on depressive symptoms in DD rats. (A) Comparison of horizontal scores (number of grid crossings) in the open field test among the four groups of rats. (B) Comparison of vertical scores (number of rearings) in the open field test among the four groups of rats. (C) Comparison of rest time in the forced swim test among the four groups of rats. (D) Comparison of immobility time in the forced swim test among the four groups of rats. (E) Comparison of OT% in the elevated plus maze test among the four groups of rats. (F) Comparison of OE% in the elevated plus maze test among the four groups of rats. (G) Comparison of serum 5-HT levels among the four groups of rats. (H) Comparison of serum DA levels among the four groups of rats. (I) Comparison of serum NE levels among the four groups of rats. Data are presented as mean ± standard deviation (SD), with 6 rats per group. Statistical analysis was performed using ANOVA. ###P < 0.001 compared to the control group. **P < 0.01 compared to the DD group. ***P < 0.001 compared to the DD group.
