From baseline to follow-up , total power ( TP ) : 1653 ( IQ 625 - 3418 ) to 2794 ( 1617 - 4452 ) ms , p = 0.02 ) and very low frequency power : 586 ( 290 - 1565 ) to 815 ( 610 - 1425 ) ms , p = 0.047 ) increased in the IG , but not in the CG .