Evidence map›Paper›PMID 36075964›Full record

ArticleCommunications biology2022

Changes in dynamic transitions between integrated and segregated states underlie visual hallucinations in Parkinson's disease.

Angeliki Zarkali, Andrea I Luppi, Emmanuel A Stamatakis, Suzanne Reeves, Peter McColgan, Louise-Ann Leyland, Andrew J Lees, Rimona S Weil

Open access · goldAbstract read
In one paragraph

Article in Communications biology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
3.1field-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

20 citing papers in PubMed, 26 citations in OpenAlex.

  1. Article
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  6. Motor Functional Hierarchical Organization of Cerebrum and Its Underlying Genetic Architecture in Parkinson's Disease.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
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  7. Review
  8. Dopamine alters functional gradients in Parkinson's disease.Imaging neuroscience (Cambridge, Mass.) · 2025
    Article
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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

8 authors at 5 institutions in 1 country.

Angeliki ZarkaliDementia Research Centre, University College London, 8-11 Queen Square, London, WC1N 3AR, UK. a.zarkali@ucl.ac.uk.ORCID 0000-0003-2808-072X
Andrea I LuppiDivision of Anaesthesia, School of Clinical Medicine, University of Cambridge, Cambridge, CB2 0QQ, UK.ORCID 0000-0002-3461-6431
Emmanuel A StamatakisDivision of Anaesthesia, School of Clinical Medicine, University of Cambridge, Cambridge, CB2 0QQ, UK.ORCID 0000-0001-6955-9601
Suzanne ReevesDivision of Psychiatry, University College London, 149 Tottenham Court Rd, London, W1T 7BN, UK.
Peter McColganHuntington's Disease Centre, University College London, Russell Square House, London, WC1B 5EH, UK.
Louise-Ann LeylandDementia Research Centre, University College London, 8-11 Queen Square, London, WC1N 3AR, UK.
Andrew J LeesReta Lila Weston Institute of Neurological Studies, University College London, 1 Wakefield Street, London, WC1N 1PJ, UK.
Rimona S WeilDementia Research Centre, University College London, 8-11 Queen Square, London, WC1N 3AR, UK.
UK Dementia Research Institute · GBUniversity College London · GBUniversity of Cambridge · GBHuntington's Disease Association · GBWellcome Centre for Human Neuroimaging · GB

Funding

Department of HealthWellcome TrustWellcome Trust 205167/Z/16/Z
6 · The paper itself

Abstract

Hallucinations are a core feature of psychosis and common in Parkinson's. Their transient, unexpected nature suggests a change in dynamic brain states, but underlying causes are unknown. Here, we examine temporal dynamics and underlying structural connectivity in Parkinson's-hallucinations using a combination of functional and structural MRI, network control theory, neurotransmitter density and genetic analyses. We show that Parkinson's-hallucinators spent more time in a predominantly Segregated functional state with fewer between-state transitions. The transition from integrated-to-segregated state had lower energy cost in Parkinson's-hallucinators; and was therefore potentially preferable. The regional energy needed for this transition was correlated with regional neurotransmitter density and gene expression for serotoninergic, GABAergic, noradrenergic and cholinergic, but not dopaminergic, receptors. We show how the combination of neurochemistry and brain structure jointly shape functional brain dynamics leading to hallucinations and highlight potential therapeutic targets by linking these changes to neurotransmitter systems involved in early sensory and complex visual processing.

Indexed as

Parkinson DiseaseBrainBrain MappingHallucinationsHumansMagnetic Resonance Imaging

Identifiers

PMID36075964
PMCPMC9458713
OpenAlexW4294943574

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.