Sleep parameters pre and post chronic mild stress (CMS) exposure.

All values are in minutes, except percentage and number of episodes; mean (SEM). LMS = long maternal separation, BMS = brief maternal separation. Statistical analyses: Total sleep time: main effect of group and recording day (F’s(1,12)≥6.0, p<0.05); Sleep stages: group×sleep stage and group×sleep stage×recording day (F’s(3,33)≥3.1, p<0.05); Number of NREM sleep episodes: recording day (F(1,11) = 17.2, p<0.01); percentage of NREM episodes ending in REM sleep: group×recording day (F(1,11) = 9.6, p<0.05); Number of REM sleep episodes: group×recording day (F(1,11) = 5.0, p<0.05); Mean duration of wakefulness episodes: recording day (F(1,12) = 7.4, p<0.05); Longest duration of wakefulness episode: group (F(1,12) = 6.1, p<0.05). Between group differences are shown by P-values and Cohen’s d effect sizes. Within group differences are denoted with*<0.05;**<0.01;***<0.001.