Evidence map›Paper›PMID 28188306›Full record

ArticleNeurology2017

Left frontal cortex connectivity underlies cognitive reserve in prodromal Alzheimer disease.

Nicolai Franzmeier, Marco Duering, Michael Weiner, Martin Dichgans, Michael Ewers, Alzheimer's Disease Neuroimaging Initiative (ADNI)

Open access · bronzeAbstract read
In one paragraph

Article in Neurology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 84 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
84citing papers in PubMed, 1 pooled it
7.6field-weighted citation impact, top 2% 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

84 citing papers in PubMed, 1 synthesis or guideline pooled it, 149 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Article
  4. Modular brain networks shape amyloid-driven tau spread and cognitive decline.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
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  10. Multimodal spatial gradients to explain regional susceptibility to fibrillar tau in Alzheimer's disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
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  14. Review
  15. Observational
  16. Educational disparities in brain health and dementia across Latin America and the United States.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2024
    Article
  17. Article
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  19. Review
  20. Article

24 more citing papers are in PubMed but not listed here.

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

6 authors at 2 institutions in 2 countries.

Nicolai FranzmeierFrom the Institute for Stroke and Dementia Research (N.F., M. Duering, M. Dichgans, M.E.), Klinikum der Universität München, Ludwig-Maximilians-Universität LMU, Munich, Germany; University of California at San Francisco (M.W.); Munich Cluster for Systems Neurology (SyNergy) (M. Dichgans); and German Center for Neurodegenerative Diseases (M. Dichgans), Munich, Germany.
Marco DueringFrom the Institute for Stroke and Dementia Research (N.F., M. Duering, M. Dichgans, M.E.), Klinikum der Universität München, Ludwig-Maximilians-Universität LMU, Munich, Germany; University of California at San Francisco (M.W.); Munich Cluster for Systems Neurology (SyNergy) (M. Dichgans); and German Center for Neurodegenerative Diseases (M. Dichgans), Munich, Germany.
Michael WeinerFrom the Institute for Stroke and Dementia Research (N.F., M. Duering, M. Dichgans, M.E.), Klinikum der Universität München, Ludwig-Maximilians-Universität LMU, Munich, Germany; University of California at San Francisco (M.W.); Munich Cluster for Systems Neurology (SyNergy) (M. Dichgans); and German Center for Neurodegenerative Diseases (M. Dichgans), Munich, Germany.
Martin DichgansFrom the Institute for Stroke and Dementia Research (N.F., M. Duering, M. Dichgans, M.E.), Klinikum der Universität München, Ludwig-Maximilians-Universität LMU, Munich, Germany; University of California at San Francisco (M.W.); Munich Cluster for Systems Neurology (SyNergy) (M. Dichgans); and German Center for Neurodegenerative Diseases (M. Dichgans), Munich, Germany.
Michael EwersFrom the Institute for Stroke and Dementia Research (N.F., M. Duering, M. Dichgans, M.E.), Klinikum der Universität München, Ludwig-Maximilians-Universität LMU, Munich, Germany; University of California at San Francisco (M.W.); Munich Cluster for Systems Neurology (SyNergy) (M. Dichgans); and German Center for Neurodegenerative Diseases (M. Dichgans), Munich, Germany. Michael.Weiner@ucsf.edu.
Alzheimer's Disease Neuroimaging Initiative (ADNI)
Munich Cluster for Systems Neurology · DEUniversity of California, San Francisco · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo test whether higher global functional connectivity of the left frontal cortex (LFC) in Alzheimer disease (AD) is associated with more years of education (a proxy of cognitive reserve [CR]) and mitigates the association between AD-related fluorodeoxyglucose (FDG)-PET hypometabolism and episodic memory.

methodsForty-four amyloid-PET-positive patients with amnestic mild cognitive impairment (MCI-Aβ+) and 24 amyloid-PET-negative healthy controls (HC) were included. Voxel-based linear regression analyses were used to test the association between years of education and FDG-PET in MCI-Aβ+, controlled for episodic memory performance. Global LFC (gLFC) connectivity was computed through seed-based resting-state fMRI correlations between the LFC (seed) and each voxel in the gray matter. In linear regression analyses, education as a predictor of gLFC connectivity and the interaction of gLFC connectivity × FDG-PET hypometabolism on episodic memory were tested.

resultsFDG-PET metabolism in the precuneus was reduced in MCI-Aβ+ compared to HC (

conclusionsHigher gLFC connectivity is a functional substrate of CR that helps to maintain episodic memory relatively well in the face of emerging FDG-PET hypometabolism in early-stage AD.

Indexed as

Alzheimer DiseaseChi-Square DistributionCognition DisordersCognitive ReserveEpilepsyFemaleFluorodeoxyglucose F18Frontal LobeFunctional LateralityHumansMagnetic Resonance ImagingMaleNerve NetNeuropsychological TestsOxygenPositron-Emission TomographyFluorodeoxyglucose F18Oxygen

Identifiers

PMID28188306
PMCPMC5384837
OpenAlexW2586384224

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.