Stroke is the second leading cause of death in Europe and the leading cause of long therm disability. With the decrease in deaths rate, the number of stroke survivors is growing up and a good post-stroke rehabilitation plan is fundamental for regaining autonomy. Before starting rehabilitation, it is necessary to assess motor function impairment and this is done using clinical scales. In particular Upper-Extremity Fugl-Meyer Assessment is the most used for stroke patients in case of upper limb motor deficits. However, this scale is clinician-dependent, the evaluation is qualitative, gives only partial information and has only poor sensitivity to mild impairment.