Although dyskinesia is a frequent and important problem in Parkinson's disease (PD), a
reliable assessment measure has not been thoroughly developed and tested. We modified …

Cognitive impairment (CI) and dementia are frequent and debilitating features associated
with Parkinson's disease (PD). Formal neuropsychological examination is required to …

Parkinson's disease (PD) is a multi-systemic disorder that is characterized by a combination
of motor and non-motor symptoms (NMS). The dopaminergic neurodegeneration of PD is …

Parkinson's disease (PD) is frequently associated with mental dysfunction. Domain‐specific
cognitive deficits are ubiquitous, and although they may not be clinically apparent in all …

Our purpose was to characterize a state of mild cognitive impairment (MCI) in Parkinson's
disease (PD)(PD‐MCI) that would be analogous to the MCI that is posited as a precursor of …

Prevalence rates of depressive disorders in Parkinson's disease (PD) vary widely across
studies, ranging from 2.7% to more than 90%. The aim of this systematic review was to …

This study was undertaken to determine the prevalence and correlates of cognitive
impairment (CI) and neuropsychiatric symptoms (NPS) in early, untreated patients with …

We examined the frequency of Parkinson disease with mild cognitive impairment (PD‐MCI)
and its subtypes and the accuracy of 3 cognitive scales for detecting PD‐MCI using the new …

Idiopathic Parkinson's disease (IPD) has been subclassified on the basis of predominant
motor symptomatology, age at disease onset, depressive affect, and cognitive performance …

Our objective was to evaluate the ability of neurologists to recognize and diagnose drug‐
induced Parkinsonism (DIP) in the elderly. DIP is a diagnostic challenge because it can be …