Introduction Clinical presentation and progression of cognitive disorders in Parkinson's
disease (PD) is heterogeneous. Our objective was to confirm prospectively a previous …

Aims: The aim of this study was to examine the heterogeneity of cognitive dysfunction in
Parkinson's disease (PD) and to evaluate the contribution of cognitive criteria to the …

Background: Cognitive deficits are common in Parkinson's disease (PD), but the range of
deficits is variable. The aim of this study was to identify different cognitive subgroups …

Background Parkinson's disease (PD) is a highly heterogeneous disease, in which motor
symptom subtypes are often-described. While it is recognized that motor, cognitive and …

Background and Purpose Cognitive impairments are common in Parkinson's disease (PD),
although the severity of these impairments does not significantly impair the patient's daily …

The objective of this study was to identify different cognitive phenotypes in Parkinson's
disease (PD) using a data‐driven approach. A model‐based cluster analysis was conducted …

Objectives: Neurocognitive disorders in Parkinson's disease (PD) are common and
heterogeneous. The aim of this study was to use a data-driven method to describe different …

Objective: To determine the frequency and pattern of cognitive dysfunction in patients with
newly diagnosed Parkinson disease (PD) and to identify its demographic and clinical …

Introduction: Cognitive impairments are common in Parkinson's disease (PD) patients
without dementia. These deficits are quite heterogeneous, which makes it difficult to …

The main histopathological hallmarks of Parkinson's disease (PD) are the degeneration of
the dopaminergic neurons of the substantia nigra pars compacta and the loss of …