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. Author manuscript; available in PMC: 2021 Jan 1.
Published in final edited form as: Neurobiol Aging. 2019 Oct 14;85:83–95. doi: 10.1016/j.neurobiolaging.2019.10.004

Figure 1. Whole-brain analysis of relative power.

Figure 1.

A. F-ratios associated with between-group mass univariate analyses of variance (ANOVAs) comparing relative electroencephalography (EEG) power between Alzheimer’s disease (AD), Type-2 diabetes mellitus (T2DM), and healthy controls (HC) across all electrodes (y-axis) and frequencies (x-axis). The solid black contour represents data points surviving cluster-based multiple comparison correction. B. Topographic representation of the F-ratios averaged across the significant frequencies. C. Mean power spectra (with 95% confidence intervals; CI) for each group separately at the electrode (CP6) for which group differences were maximal. Alpha/beta power showed a linear decrease across groups, being highest for HC and lowest for AD with T2DM having intermediate values whereas delta/theta power showed a linear increase across groups. D-F. T-values associated with follow-up tests comparing relative EEG power between each pair of groups separately. Solid black contours indicate data points surviving cluster-correction. G-H. Topographic representation of the t-values associated with the respective significant effects. Significant electrodes are highlighted in gray.