Fig. 1: Power and Connectivity for a sample subject in slow
gamma band across left and right seed electrode groups
(a) Average scalp map of absolute slow gamma band power (in log10
(µV2) units) during stimulus duration [0.25 0.75]
s across 64 electrodes, for a representative subject. (b) Similar to (a)
for change in slow gamma power computed relative to the baseline power,
corresponding to the interval [-0.5 0] s, in decibels (dB). Note
that the predominant power is in occipital electrodes in (a) and (b)
scalp maps. (c) Change in power spectral density (PSD) across the left
and right seed electrode groups. These electrode groups are shown in
black circles in b. Dashed lines indicate the slow gamma range. (d) The
scalp map of average FC measured using PPC between all the electrodes
within each of the seed electrodes in the left (electrodes P3, P1, and
PO3; top plot) and right (P2, P4, and PO4; bottom plot) groups. (e)
Functional connectivity as a function of inter-electrode distance from
the seed electrodes plotted for each of the three electrodes in the
group with the other remaining electrodes. Schematic on top right shows
the four electrode clusters (frontal, central, occipital, and temporal)
defined over both the hemispheres, denoted by the four colours, cyan,
red, yellow, and green respectively, with the hemisphere side denoted by
filled circle for left and open triangle for right.