directions (e.g., Fp1-F3) because of increased packing density in the posterior cortex as compared to frontal cortex (Thatcher et al., 2009a). The results of the present study are also consistent with the hypothesis that phase shift is related to recruitment of neurons and phase lock duration is directly related to synchrony or binding of neurons as an exponential function of packing density and inter-node (Brodmann area) distance.
