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EEG spectral analysis was performed during wakefulness (wake, left), NREM (middle), and REM (right), as well as for the 12-h light and 12-h dark phases. Absolute EEG power (μV2/Hz ± SE) in the theta I (4–8 Hz) and theta II (6–10 Hz) frequency bands is presented. There is a significant increase in theta I and theta II power in db/db mice vs. wt animals during wakefulness and REM sleep. Genotype differences (*P < 0.05, **P < 0.01).
