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. 2019 Mar 1;10:115. doi: 10.3389/fphys.2019.00115

Figure 11.

Figure 11

Fluctuation functions of EEG during NREM and REM sleep with maximally overlapped blocks. Time series are 1600-s segments of an EEG C4 lead sampled at 128 Hz during sleep in a healthy volunteer. The first horizontal axis is the box size, n, in number of samples, the second horizontal axis is the temporal scale, τ, in milliseconds, obtained multiplying n by the sampling period. Thresholds Th1 and Th2 as in Equations (19) and EPS = 10−4.