Parkinson’s disease: the flip side of the coin
The human brain might be perceived as an organ with two main strategic tasks: goal-directed motor behavior, and mental functioning in order to work out that goal. These two main functions have two prototypical diseases: Alzheimer disease, in case of mental function, and Parkinson’s disease, with motor function. Following its inception as an entity, Parkinson’s disease (PD) was long perceived to be a purely motor disorder with unimpaired mental functions.