New Perspectives for Computer-Aided Discrimination of Parkinson’s Disease and Essential Tremor

Figure 6

(a) Average amplitude of the rest and postural tremor in 54 ET and PD patients, as computed from the following: top: the neural drive (ND); middle: the spatial average of all the rectified EMG channels per muscle (EMG); and bottom: accelerometers (IMU). Tremor amplitude was assessed from the most affected muscle (ND and EMG) and from dominant tremor site (IMU). Each dot in the scatter plots represents one patient. The amplitude of the neural drive is expressed in arbitrary units (a.u.; see text). (b) Statistical comparison of the three different tremor amplitude estimates across ET and PD patients. and denote statistically significant difference as assessed by Kruskal-Wallis test.

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