Comparative cognitive and neuropsychiatric profiles between Parkinson's disease, multiple system atrophy and progressive supranuclear palsy.

The present study underlined the pervasiveness of cognitive deficits, apathy and depressive symptoms in PSP, whereas little cognitive differences were found between PD and MSA. The findings indirectly supported a dysfunction of prefronto-subcortical circuitries (i.e., dorsolateral prefrontal and limbic circuits) in PSP and PD. Cognitive similarities between MSA and PD reinforced the pivotal role of altered basal ganglia and corresponding frontal deafferentation in the occurrence of the cognitive deficits.