Figure 3. .

Alpha modulation by memory load. (A) Posterior ROI for the analysis of alpha activity was superimposed on the topographical map of alpha power modulation by working memory load (averaged across the UF and UM data sets). (B) Power spectra for different memory load and (C) modulation of alpha power (8–13 Hz) by memory load during retention for UF data set. (E) Power spectra for different memory load and (F) modulation of alpha power by memory load during retention for UM BAS data set. Time–frequency analysis for (D) UF data set and (G) UM BAS data set. *p < .05.