Evidence map›Paper›PMID 26705763›Full record

ArticleHuman brain mapping2016

Neural correlates of attention-executive dysfunction in lewy body dementia and Alzheimer's disease.

Michael Firbank, Xenia Kobeleva, George Cherry, Alison Killen, Peter Gallagher, David J Burn, Alan J Thomas, John T O'Brien, John-Paul Taylor

Open access · hybridAbstract read
In one paragraph

Article in Human brain mapping, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 35 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
35citing papers in PubMed, 1 pooled it
3.6field-weighted citation impact, top 7% 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

35 citing papers in PubMed, 1 synthesis or guideline pooled it, 67 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Article
  4. Article
  5. Article
  6. A spatial covarianceJournal of neurology · 2025
    Article
  7. Article
  8. Behavioral disorders in dementia with Lewy bodies: old and new knowledge.Journal of neural transmission (Vienna, Austria : 1996) · 2025
    Review
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Review
  19. Article
  20. Article
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

9 authors at 3 institutions in 2 countries.

Michael FirbankInstitute of Neuroscience, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, NE4 5PL, United Kingdom.
Xenia KobelevaInstitute of Neuroscience, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, NE4 5PL, United Kingdom.
George CherrySchool of Medical Science, Newcastle University, Newcastle-upon-Tyne, NE2 4HH, United Kingdom.
Alison KillenInstitute of Neuroscience, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, NE4 5PL, United Kingdom.
Peter GallagherInstitute of Neuroscience, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, NE4 5PL, United Kingdom.
David J BurnInstitute of Neuroscience, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, NE4 5PL, United Kingdom.
Alan J ThomasInstitute of Neuroscience, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, NE4 5PL, United Kingdom.
John T O'BrienDepartment of Psychiatry, University of Cambridge School of Clinical Medicine, Cambridge, CB2 0SP, United Kingdom.
John-Paul TaylorInstitute of Neuroscience, Newcastle University, Campus for Ageing and Vitality, Newcastle upon Tyne, NE4 5PL, United Kingdom.
Newcastle Hospitals - Campus for Ageing and Vitality · GBNewcastle University · GBUniversity of Cambridge · GB

Funding

Wellcome Trust
6 · The paper itself

Abstract

Attentional and executive dysfunction contribute to cognitive impairment in both Lewy body dementia and Alzheimer's disease. Using functional MRI, we examined the neural correlates of three components of attention (alerting, orienting, and executive/conflict function) in 23 patients with Alzheimer's disease, 32 patients with Lewy body dementia (19 with dementia with Lewy bodies and 13 with Parkinson's disease with dementia), and 23 healthy controls using a modified Attention Network Test. Although the functional MRI demonstrated a similar fronto-parieto-occipital network activation in all groups, Alzheimer's disease and Lewy body dementia patients had greater activation of this network for incongruent and more difficult trials, which were also accompanied by slower reaction times. There was no recruitment of additional brain regions or, conversely, regional deficits in brain activation. The default mode network, however, displayed diverging activity patterns in the dementia groups. The Alzheimer's disease group had limited task related deactivations of the default mode network, whereas patients with Lewy body dementia showed heightened deactivation to all trials, which might be an attempt to allocate neural resources to impaired attentional networks. We posit that, despite a common endpoint of attention-executive disturbances in both dementias, the pathophysiological basis of these is very different between these diseases.

Indexed as

AgedAlzheimer DiseaseAttentionBrainCholinesterase InhibitorsCuesExecutive FunctionFemaleHumansLewy Body DiseaseMagnetic Resonance ImagingMaleNeuropsychological TestsNootropic AgentsPhotic StimulationReaction TimeCholinesterase InhibitorsNootropic AgentsAlzheimer's diseaseattentionattention network testexecutivefunctional MRILewy body dementia

Identifiers

PMID26705763
PMCPMC4784171
OpenAlexW2224457883

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.