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Sleep electroencephalogram spectral analysis recorded using O2-M1, C4-M1, and F4-M1 derivations. Spectral power is shown for Delta (<4 Hz) and Theta (4–7.9 Hz). One-Way analysis of variance followed by Bonferroni post-hoc test using the Z-score of the spectral power as dependent variables. *p < 0.05 vs. Young Adult; #p < 0.05 vs. older adult; +p < 0.05 vs. oldest old. Error bars represent standard error of the mean.
