phase lock duration than longer distance inter-electrode parings (18–24 cm). Furthermore, it has been shown that phase shift duration is positively related to intelligence while phase lock duration is negatively related to intelligence measured by WISC-R I.Q. test (Thatcher et al., 2008a). The findings of Thatcher et al. (2008a, 2009a) and Lehmann et al. (2006) are consistent with the hypothesis that phase shift is a process involved in the recruitment of available neurons at a given moment of time and phase lock duration is the binding or synchrony of groups of neurons that simultaneously mediate different functions in different brain regions (i.e., sustained commitment of neurons). It is also possible that phase lock reflects the inhibition of billions of “irrelevant” neurons that are excluded or restricted resulting in the “protection” of a small subset of neural loops that mediate a multidimensional sub-network. That is, the large spatial inhibition isolates a spatially smaller subset of synchronized neurons that are masked or invisible to the scalp recorded EEG. The present study is a further exploration of the scalp surface EEG studies of phase shift and phase lock duration by applying 4-dimensional neuroimaging (tEEG) of current sources using Low Resolution Electromagnetic Tomography (LORETA)
