All kinematic data were transferred to a PC, post processed with the commercially available program CSWIN 1.2 and analyzed with SPSS 15.0. Non parametric kernel estimation
was used for the calculation and smoothing of movement derivatives like velocity and acceleration
Writing and drawing movement were segment into vertical strokes, i.e. up and downward movement. A stroke segment ended when the velocity projection on the y-axis passed throuth zero. Although all strokes of the writing task were included in analysis, only
the first 99 stroke of the 30s circle drawing task were analyzed
Several kinematic paramrters were determined for each of the tasks. We categorized them
into four movement domains of handwriting . speed, the most commonly described feature of hand movement in the literature, constitutes the first movement domain