Evidence map›Paper›PMID 25425542›Full record

ArticleHuman brain mapping2015

Dopaminergic basis for impairments in functional connectivity across subdivisions of the striatum in Parkinson's disease.

Peter T Bell, Moran Gilat, Claire O'Callaghan, David A Copland, Michael J Frank, Simon J G Lewis, James M Shine

Open access · greenAbstract read
In one paragraph

Article in Human brain mapping, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
43citing papers in PubMed, 1 pooled it
3.3field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

43 citing papers in PubMed, 1 synthesis or guideline pooled it, 84 citations in OpenAlex.

  1. Pooled it
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  7. Dopamine alters functional gradients in Parkinson's disease.Imaging neuroscience (Cambridge, Mass.) · 2025
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  9. Chemically Synthesized AgNPs andJournal of fungi (Basel, Switzerland) · 2023
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 3 institutions in 2 countries.

Peter T BellBrain and Mind Research Institute, The University of Sydney, Sydney, NSW, Australia; University of Queensland Centre for Clinical Research, University of Queensland, Brisbane, QLD, Australia.
Moran Gilat
Claire O'Callaghan
David A Copland
Michael J Frank
Simon J G Lewis
James M Shine
University of Sydney · AUUniversity of Queensland · AUBrown Institute for Media Innovation · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The pathological hallmark of Parkinson's disease is the degeneration of dopaminergic nigrostriatal neurons, leading to depletion of striatal dopamine. Recent neuroanatomical work has identified pathways for communication across striatal subdivisions, suggesting that the striatum provides a platform for integration of information across parallel corticostriatal circuits. The aim of this study was to investigate whether dopaminergic dysfunction in Parkinson's disease was associated with impairments in functional connectivity across striatal subdivisions, which could potentially reflect reduced integration across corticostriatal circuits. Utilizing resting-state functional magnetic resonance imaging (fMRI), we analyzed functional connectivity in 39 patients with Parkinson's disease, both "on" and "off" their regular dopaminergic medications, along with 40 age-matched healthy controls. Our results demonstrate widespread impairments in connectivity across subdivisions of the striatum in patients with Parkinson's disease in the "off" state. The administration of dopaminergic medication significantly improved connectivity across striatal subdivisions in Parkinson's disease, implicating dopaminergic deficits in the pathogenesis of impaired striatal interconnectivity. In addition, impaired striatal interconnectivity in the Parkinson's disease "off" state was associated with pathological decoupling of the striatum from the thalamic and sensorimotor (SM) networks. Specifically, we found that although the strength of striatal interconnectivity was positively correlated with both (i) the strength of internal thalamic connectivity, and (ii) the strength of internal SM connectivity, in both healthy controls and the Parkinson's disease "on" state, these relationships were absent in Parkinson's disease when in the "off" state. Taken together our findings emphasize the central role of dopamine in integrated striatal function and the pathological consequences of striatal dopamine denervation in Parkinson's disease.

Indexed as

AgedAntiparkinson AgentsBrain MappingCorpus StriatumDopamineDopamine AgentsFemaleHead MovementsHumansMagnetic Resonance ImagingMaleMiddle AgedNeural PathwaysParkinson DiseaseRestSignal Processing, Computer-AssistedAntiparkinson AgentsDopamineDopamine AgentsconnectivitydopaminenetworkParkinson's diseaseresting-statestriatumsubcortexthalamus

Identifiers

PMID25425542
PMCPMC6869546
OpenAlexW1506132383

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.