The observed increase with age in intramodal power correlations, with the largest relative increase between the most distant electrodes, is consistent with the increase in white matter and increased functional integration with age during adolescence (Rubia, 2013, pp. 84, 86). A trend from local connectivity to more global patterns of connectivity has been shown by studies of the development of brain networks using MRI methods (Fair et al., 2008, 2009; Power et al., 2010; Supekar et al., 2009; Uddin et al., 2011; Vogel et al., 2010; Zielinski et al., 2010). Since data from only three midline electrodes has been analyzed at this time, the topographical information required for a more detailed comparison with the MRI data is not available. However, data has been recorded from a dense array of electrodes across the scalp and will be subject to further analysis.
