Fig. 6

Human MEG spectral analyses. Shown are median and IQR of the relative power in commonly used frequency bands (A theta (4–8 Hz), B lower alpha 1 (8–10 Hz), C higher alpha 2 (10–13 Hz), D beta (13–30 Hz)) as well as the E peak frequency (that represents the posterior dominant frequency within the 6–13 Hz band), and F total power (absolute broadband (0.5–48 Hz)) power for 18 MCI+ patients (shown in red) and 18 elderly controls (SCD−, shown in grey). Each dot represents the average value for each subject over 5 epochs and 80 channels. G The power spectrum is normalized such that the total power is 1 for each group. Shown are the mean and standard deviation per group. **p < 0.01, *p < 0.05