Figure 1
From: Noninvasive fractal biomarker of clock neurotransmitter disturbance in humans with dementia
Alterations of fractal correlations in motor activity fluctuations in dementia patients.
(A) 72-hour activity recording of a representative dementia patient. (B) Detrended fluctuation function F(n) of the activity signal shown in (a). F(n) displayed different power-law behavior with different scaling exponent, α1 and α2, at time scales smaller than and larger than ~ 2 hours (indicated by dotted dashed line). For comparison, F(n) of young adults as observed in a previous study13 was also plotted (dashed black line). (C) Difference between α1 and α2 for all subjects (except for 5 individuals with no α2 due to many missing data points in their recordings). The subject # 13 (filled circle) is the patient whose data are shown in (A) and (B).
