Examination of the factor analyses showed that there are two main “modes” or time frames of duration for phase lock duration. The x, y, and z directions all showed essentially the same duration modes and Figure 4 shows the two duration frames for phase lock using the resultant vector for both the eyes closed and eyes open conditions. The x-axis is phase lock duration in milliseconds and the y-axis are the percent of subjects (N = 70) in both the eyes closed and open conditions. It can be seen in Figure 4 that the subjects clustered in two different and discrete time frames or modes. Mode 1 showed a peak phase lock duration of approximately 250 ms and Mode 2 was approximately 425 ms. There was a minor mode at approximately 800 ms which was much smaller than modes 1 and 2. There was little overlap between phase duration modes and all variables exhibited only one of the two modes with no bi-modal distributions which demonstrates discrete time frames of phase lock duration in specific groups of Brodmann areas that comprise the DMN.
