Fig. 2 | Scientific Reports

Fig. 2

From: Feeding the mind: preliminary insights into the effects of Anthocyanin-Rich Extract from black carrots on brain activity and gut microbiota in patients with cognitive impairments

Fig. 2

Changes in FD values before and after ARE consumption are visualized using z-score–based colormaps across selected EEG frequency bands: All Spectrum (1–45 Hz), Delta (1–3 Hz), Theta (3–7 Hz), Alpha (7–12 Hz), and Gamma (30–45 Hz). The Beta band was excluded due to a limited number of statistically significant findings. Statistically significant decreases in FD were predominantly observed in the Delta and Theta bands, particularly in frontal regions (e.g., Fp2, F4, Fz). In the All Spectrum analysis, Fp2 also exhibited a significant change. Electrodes with significant changes (\(p < 0.05\), Wilcoxon signed-rank test) are highlighted in blue; however, none survived FDR correction at \(q < 0.10\).

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