The distributions of logarithmic power values in reference to the baseline in each frequency band.

<p>As for the 4 groups, HFA_{<b>SEP(N20)</b>} (a black solid line), HFA_{<b>CCEP(N1)</b>} (a grey solid line), HFA_{<b>SEP(N80)</b>} (a black dashed line) and HFA_{<b>CCEP(N2)</b>} (a grey dashed line), all the power values of 7 hemispheres are averaged (mean ± SE). RM-ANOVA showed statistically significant interactions between the 4 groups. An asterisk indicates significant interaction between the 2 groups in the post-hoc analysis. Other conventions are the same as for <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0130461#pone.0130461.g003" target="_blank">Fig 3</a>.