Figure 4

Relationship of current delivered and FES effect. The figure shows the relationship between the total amount of current delivered (axis x: sum of current delivered on the 4 muscles) and the effect of FES on reduction of PSD (expressed as% of baseline: ratio of the maxPSD in HSTINL by maxPSD in HNSNL; composite acceleration). Tremor recorded at the finger (accelerometer 1, left panel) and at the hand (accelerometer 2, right panel) The FES-induced decrease of PSD is stronger when the intensity of current delivered is around 20 mAmp. Dashed lines: 99% confidence interval; dotted lines: 99% prediction intervals.