Research Article

Dynamic Variability of Isometric Action Tremor in Precision Pinching

Figure 6

Scatter plot of the concordance phase variable against logarithmically scaled total tremor power using values from all trial segments of both the PD and OA groups, although data from the OA group are too clustered for resolution of most of those individual points. At background tremor power levels the concordance phase values are concentrated in the upper range of the scale, but as total power increases beyond the background level, many concordance phase values show up in the lower range of the scale.
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