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

Figure 1

Surface EMG amplitude of the wrist extensors in a PD patient during rest condition. Electrode location greatly influences the EMG characterization of tremor. Tremor amplitude computed from the surface EMG using standard methods was highly variable across 60 bipolar channels of single-differential EMG (recorded with an array of 5 × 13 electrodes with interelectrode distance of 8 mm); for example, it ranged from severe tremor in channel 25 to no tremor in channel 59.

(a)

(b)