Ketogenic interventions enhance REM sleep in females and support memory in aged rats.

During the subsequent dark phase (ZT 12–24), males showed a trend toward reduced wakefulness ( p = 0.0586) and increased NREM sleep ( p = 0.0567; Figures 2B , D ), suggesting a redistribution of vigilance states across the circadian cycle.

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CD females showed a similar trend toward reduced total power ( p = 0.0625) and theta power ( p = 0.0843) during NREM sleep, although these changes did not reach statistical significance ( Figure 4B ).

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