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. 2019 Nov 30;43(5):zsz289. doi: 10.1093/sleep/zsz289

Figure 4.

Figure 4.

REM sleep theta power does not change regularly across the estrous cycle. (A) Distribution of female rat power spectra during REM sleep in the medial prefrontal cortex (mPFC) EEG, secondary visual cortex (V2) EEG (B), and CA1 LFP (C). Each panel has a range of 0–20 Hz; there were no changes at frequencies greater than 20 Hz, so higher frequencies are not displayed. The power at each frequency was analyzed across phases of the estrous cycle using repeated measures two-way ANOVA: parts A and B, F(3, 24), part C, F(3, 21). Tukey post hoc. *p < 0.05. The colored line with similar colored asterisk above it represents frequencies where one phase of the estrous cycle is significantly higher than all other phases of the estrous cycle. Data displayed as the darker line represents the mean and the lighter shaded region of analog color represents the SEM for that group. For both mPFC EEG and V2 EEG, n = 9 females. For CA1 LFP, n = 8, as one animal had a broken depth electrode.