Parkinson's disease is a recognisable clinical syndrome with a range of causes and clinical
presentations. Parkinson's disease represents a fast-growing neurodegenerative condition; …

In Parkinson disease (PD), pathological processes and neurodegeneration begin long
before the cardinal motor symptoms develop and enable clinical diagnosis. In this prodromal …

Background Previous studies have reported that gut microbiota, permeability, short-chain
fatty acids (SCFAs), and inflammation are altered in Parkinson's disease (PD), but how these …

Dementia is a frequent problem encountered in advanced stages of Parkinson disease (PD).
In recent years, research has focused on the pre-dementia stages of cognitive impairment in …

Parkinson's disease (PD) is a highly heterogeneous disorder, which probably consists of
multiple subtypes. Aggregation of misfolded alpha-synuclein and propagation of these …

The most definitive classification systems for dementia are based on the underlying
pathology which, in turn, is categorized largely according to the observed accumulation of …

Depression is one of the most frequent and burdensome non-motor symptoms in
Parkinson's disease (PD), across all stages. Even when its severity is mild, PD depression …

We conducted a systematic review and meta‐analysis aimed at establishing robust
prevalence estimates and identifying clinical correlates of fatigue in PD. From 2,459 titles …

Parkinson's disease is highly heterogeneous in early clinical features and later outcomes.
This makes classifying subgroups of PD relevant to clinical research and practice …

Objective To define the clinical features and biomarkers that predict which patients with pure
autonomic failure will develop Parkinson disease, dementia with Lewy bodies, or multiple …