Figure 2.

The number (A) and mean duration (B) of rapid-eye movement sleep (REMS) episodes during baseline recordings for the 12 h light (white bars) and 12 h dark phases (black bars) and during 12 h of recovery sleep opportunity (dark phase; gray bars) following 6 h of sleep deprivation. See the legend of Figure 1 for further information regarding the hormonal treatment groups. The number of REMS episodes (A) in the dark phase was lower in the HE, LP, LEP, and M groups compared to the Oil group under both baseline and recovery conditions. The mean duration of REMS episodes (B) was significantly longer during the recovery dark phase relative to the baseline dark phase in the HE and LEP groups only. ^xdifferent from baseline light phase; #different from baseline dark phase; ^adifferent from Oil; all P < 0.05 (Tukey-Kramer post hoc comparisons).