Most of the developed societies are experiencing an aging trend of their population. Aging is correlated with cognitive impairment such as dementia and its most common type: Alzheimer's disease. So, there is an urgent need to develop technological tools to help doctors to do early and precise diagnoses of cognitive decline. Inability to correctly perform purposeful skilled movements with hands and other forelimbs most commonly is associated with Alzheimer’s disease [1]. These patients have difficulty to correctly imitate hand gestures and mime tool use, e.g. pretend to brush one’s hair. These patients make spatial and temporal errors