Fig. 3: Effect of aging on FC after power-matching
(a) Change in PSDs across the middle-aged and elderly age groups after
power matching applied over the left group of electrodes. Power matching
was done separately in the particular frequency range (across the rows,
from top: alpha, slow gamma, and fast gamma), as indicated by the dashed
lines. The width of the PSD trace represents SEM across the subjects
within the associated frequency bin. Note that different number of
subjects were obtained for each frequency range (N=88, 84 and 84 for
alpha, slow gamma and fast gamma, respectively). The colored bars at the
bottom represent significance of differences (K-W test, black:
p=0.01–0.05, green: p<0.01; not corrected for multiple
comparisons). (b-c) Similar to Fig. 2b-c but computed only for the
selected subjects for the left electrode group (note that in this case
left and right groups cannot be averaged since there are different
subjects in each group). d) Same as 2d, but for sub-selected population
for each electrode group. Note that the number of samples in both age
groups match as a consequence of power matching.