Fig. 6. Dependence of FC on age and power
(a) FC against age for all subjects, coloured according to the subject category, namely middle-aged (dark grey), elderly (light grey) and MCI (red). The dependency of FC on age was considered in various frequency band i.e., alpha, slow gamma, and fast gamma, plotted across columns. The vertical dashed line marks the age 65, that separates middle-aged and elderly age groups. The representative errorbar depicts median FC, within uniformly spaced bins of 5 years width. The errorbar conveys the bootstrapped median SEM. (b) FC against the change in power in the respective frequency ranges, arranged similar to (a). The median FC errorbars for each bin, with 0.6 dB width, were plotted for middle-aged and elderly groups separately. The errorbar conveys the bootstrapped median SEM. The linear regression coefficients, with the respective p-value of significance are indicated for age and power variables for each of the frequency bands. Only healthy subjects were considered for regression analysis.