It is important to say that all subjects with PD and AD were evaluated while on their medications. We chose to maintain this delimitation, as previous studies show that medication based on dopamine (for PD) does not exercise any influence on the subjects’ parameters of PImax and PEmax, just like medication based on acetylcholinesterase inhibitors and N-methyl-D-aspartate antagonists (for AD), which have a neuro-psycho-behavioral action