Figure 6 shows the results of this test in which mean phase differences were not equal to zero and instead varied as a function of distance which is what is expected in a network of connections and cannot be explained by volume conduction. In fact, phase difference values were many times greater than zero and even the most close or nearby neighbor Brodmann areas 8 and 9 differed by 2–4° and therefore also cannot be explained solely by volume conduction. Further, phase lock duration is maximal at short distances and declines with distance that also cannot be explained by volume conduction because a sustained phase difference over time must be maintained which is consistent with the known physiology of local and distant loop iteration that can extend for many milliseconds (Beste and Dinse, 2013).
