Send to

Choose Destination
Parkinsonism Relat Disord. 2017 Apr;37:87-91. doi: 10.1016/j.parkreldis.2017.02.005. Epub 2017 Feb 7.

Is fatigue associated with cognitive dysfunction in early Parkinson's disease?

Author information

Department of Neurology, University of Colorado Anschutz Medical Campus, 12631 E 17thAvenue, Aurora, CO 80045, USA. Electronic address:
Department of Neurology, The Norwegian Centre for Movement Disorders, Stavanger University Hospital, Gerd-Ragna Bloch Thorsens gate 8, 4011 Stavanger, Norway.
Department of Neurology, Haukeland University Hospital, Jonas Lies vei 65, 5021 Bergen, Norway.
Department of Neurology, Sorlandet Hospital, Sykehusveien 1, 4838 Arendal, Norway.
Department of Rehabilitation, Sorlandet Hospital, Sykehusveien 1, 4838 Arendal, Norway.



Fatigue is a common and disabling symptom which may be seen in early Parkinson's disease (PD). Our understanding of the phenomenology and etiology of fatigue in PD is limited. The objective of this study was to determine whether fatigue was related to cognition in early PD patients.


The study is part of the Norwegian ParkWest project, a population-based cohort study, comprising 184 de novo, drug-naïve patients with PD. PD was diagnosed according to the Gelb criteria. Fatigue was assessed by the Fatigue Severity Scale (FSS). Cognition was assessed by a battery of tests evaluating functions in the domains of verbal memory, processing speed, executive function and visuospatial abilities.


107 of the cohort had moderate to severe fatigue (FSS ≥ 4). In univariate correlation analyses high fatigue score was correlated to disease severity, presence of sleep problems, depressive symptoms, apathy, reduced processing speed and reduced visuospatial abilities. In a multiple regression analysis only disease severity (measured by the UPDRS part 3), sleep problems, depressive symptoms and reduced visuospatial abilities contributed to the model.


Fatigue is associated with visuospatial function in early PD patients. Further studies are needed to determine the pathophysiologic relevance of this association.


Cognition; Fatigue; Neuropsychology; Parkinson's disease

[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center