Cognitive impairments in early Parkinson's disease are accompanied by reductions in activity in frontostriatal neural circuitry
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Studies in patients with Parkinson's disease (PD) suggest that the characteristic motor symptoms of the disorder are frequently accompanied by impairments in cognition that are most profound in tasks of executive function. Neuropsychological deficits are not an inevitable consequence of the disease, yet the reasons underlying cognitive heterogeneity in PD are not well understood. To determine the underlying neural correlate of these cognitive deficits, we used event-related functional magnetic resonance imaging (fMRI) to compare groups of cognitively impaired and unimpaired patients, matched on all other clinical measures. fMRI revealed significant signal intensity reductions during a working-memory paradigm in specific striatal and frontal lobe sites in patients with cognitive impairment compared with those patients who were not cognitively unimpaired. These results demonstrate that cognitive deficits in PD are accompanied by neural changes that are related to, but distinct from, those changes that underlie motoric deficits in these patients. Furthermore, they suggest that fMRI may provide a valuable tool for identifying patients who may benefit from targeted therapeutic strategies.
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From Exercise-enhanced neuroplasticity targeting motor and cognitive circuitry in Parkinson's disease (2013) · cites this paper as [63]
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- Authors
- Lewis, S. J. G., Dove, A., Robbins, T. W., Barker, R. A., & Owen, A. M.
- Affiliations
- MRC Cognition and Brain Sciences Unit (GB)
- Venue
- The Journal of Neuroscience
- Publisher
- Society for Neuroscience
- Published
- 2003-07-16
- Volume
- 23
- Issue
- 15
- Pages
- 6351-6356
- ISSN
- 0270-6474 (ISSN-L)
- 1529-2401
- PMC
- PMC6740550
- OpenAlex
- W1805914682
- Cited by
- 532
- References
- 53
- Citations by year
- 2026: 8 · 2025: 9 · 2024: 10 · 2023: 18 · 2022: 18 · 2021: 20 · 2020: 20 · 2019: 19 · 2018: 25 · 2017: 26 · 2016: 31 · 2015: 39 · 2014: 24 · 2013: 43 · 2012: 24
- FWCI
- 11.84
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Journal of Neuroscience (publishedVersion)
- Europe PMC (PubMed Central) (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Parkinson's UK
- British Medical Association
- Medical Research Council
- Topics
- Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
- Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
- Keywords
- Parkinson's disease, cognitive impairment, executive function, frontostriatal circuits, striatum, prefrontal cortex, working memory, neural correlates of cognition, cognitive heterogeneity, event-related fMRI
- MeSH terms
- Adult, Aged, Brain Mapping, Cognition Disorders, Corpus Striatum, Female, Frontal Lobe, Humans, Magnetic Resonance Imaging, Male, Memory, Short-Term, Middle Aged, Neural Pathways, Neuropsychological Tests, Parkinson Disease, Photic Stimulation, Reference Values, Verbal Behavior
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