Fig. 6From: Temporal fluctuations of tremor signals from inertial sensor: a preliminary study in differentiating Parkinson’s disease from essential tremorThe temporal fluctuation of the training group, 32 PD (a) and 20 ET (b) subjects, while performing kinetic (plus) and resting (circle) tasks. Delay units d 1 and d 2 in relation (1) were involuntarily selected to 5 and 20, respectively. The temporal fluctuation is shown in log scale Back to article page