Detrended fluctuation as a function of the window size or scale (s) for the entire time period (upper left) of the WT (black), V_diff (blue) and PA_diff (green). The filled circles and continuous lines correspond to the actual data, whereas the empty circles and dashed lines correspond to the same, but randomly re-arranged (shuffled), data. The same analysis but for each phase of the cycle applied to the PA_diff (upper right), V_diff (lower left) and WT (lower right). The α_s value during each phase of the cycle is marked with the corresponding color. Open circles and dashed lines correspond to the DFA applied to a random vector created for comparison purposes.