Fig. 2

Prototype interface used for data selection and quality inspection. The upper left plot shows the raw cursor data (blue) and the selected, resampled cursor data (green overlay), which can be compared with the drawing screenshot (not shown). The upper right plot shows the speed over time (blue) and the selected data points (green dots). The lower plot shows the fast Fourier transform of the selected speed data, from which peaks were chosen for tremor metric calculation