634891.fig.004a
(a)
634891.fig.004b
(b)
634891.fig.004c
(c)
Figure 4: Mean and standard deviation of absolute alpha power. The statistical analysis revealed a main effect for group ( ) for all the electrodes analyzed. (a) Left frontal cortex (F3). (b) Left central cortex (C3). (c) Left parietal cortex (P3).