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Fig. 5 | BMC Neuroscience

Fig. 5

From: Homeostatic sleep regulation in the absence of the circadian sleep‐regulating component: effect of short light–dark cycles on sleep–wake stages and slow waves

Fig. 5

Effects of dark onsets regarding S-W times (ac) and epoch numbers (df) in LD1:1 (n = 5) condition. S-W data were averaged in consecutive 6-min long bins using the data of all light switches during the 24-h recordings. Two bins were analyzed in the pre-switch period (dark hour 48–54 min and 54–60 min) and two bins for the post-switch period (bright hour 0–6 min and 6–12 min). a and d: wakefulness; panel b and e: slow wave sleep; c and f: REM sleep. Significance was tested with two-way ANOVA with time and treatment as factors, followed by Sidak's multiple comparisons test. Differences were checked between the different 6-min time bins before and after the light switch during baseline and after SD and between the baseline vs. after SD values regarding the same time period. Significance levels: *—p < 0.05; **—p < 0.01; ***—p < 0.001. Data are expressed as mean ± S.E.M

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