Parkinson disease (PD) is the second most common neurodegenerative disorder, affecting>
1% of the population≥ 65 years of age and with a prevalence set to double by 2030. In
addition to the defining motor symptoms of PD, multiple non-motor symptoms occur; among
them, cognitive impairment is common and can potentially occur at any disease stage.
Cognitive decline is usually slow and insidious, but rapid in some cases. Recently, the focus
has been on the early cognitive changes, where executive and visuospatial impairments are …

Parkinson disease (PD) is the second most common neurodegenerative disorder, affecting>
1% of the population≥ 65 years of age and with a prevalence set to double by 2030. In
addition to the defining motor symptoms of PD, multiple non-motor symptoms occur; among
them, cognitive impairment is common and can potentially occur at any disease stage.
Cognitive decline is usually slow and insidious, but rapid in some cases. Recently, the focus
has been on the early cognitive changes, where executive and visuospatial impairments are …