Evidence map›Paper›PMID 30002460›Full record

ArticleScientific reports2018

Functional brain networks reveal the existence of cognitive reserve and the interplay between network topology and dynamics.

Johann H Martínez, María Eugenia López, Pedro Ariza, Mario Chavez, José A Pineda-Pardo, David López-Sanz, Pedro Gil, Fernando Maestú, Javier M Buldú

Abstract read
In one paragraph

Article in Scientific reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

15 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Electroencephalography, Magnetoencephalography, and Cognitive Reserve: A Systematic Review.Archives of clinical neuropsychology : the official journal of the National Academy of Neuropsychologists · 2021
    Pooled it
  2. Review
  3. A complex network perspective on brain disease.Biological reviews of the Cambridge Philosophical Society · 2026
    Review
  4. Article
  5. Article
  6. Article
  7. Cognitive resilience/reserve: Myth or reality? A review of definitions and measurement methods.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2024
    Review
  8. Article
  9. Article
  10. Article
  11. Electrophysiological Proxy of Cognitive Reserve Index.Frontiers in human neuroscience · 2021
    Article
  12. Using symbolic networks to analyse dynamical properties of disease outbreaks.Proceedings. Mathematical, physical, and engineering sciences · 2020
    Article
  13. Article
  14. Article
  15. 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.

Johann H MartínezINSERM U-1127, Institut du Cerveau et de la Moelle Épinière (ICM), Hôpital Pitié Salpêtrière, Paris, France.ORCID 0000-0002-3365-8189
María Eugenia LópezDepartment of Experimental Psychology, Cognitive Processes and Speec, Complutense University of Madrid, Madrid, Spain. meugenia.lopez@ctb.upm.es.ORCID 0000-0002-3928-2629
Pedro ArizaGISC & Laboratory of Biological Networks, Center for Biomedical Technology, Universidad Politécnica de Madrid, Madrid, Spain.ORCID 0000-0002-6847-9877
Mario ChavezCNRS UMR-7225, Hôpital Pitié-Salpêtrière, Paris, France.
José A Pineda-PardoCentro Integral de Neurociencias AC (CINAC), HM Puerta del Sur, Madrid, Spain.
David López-SanzDepartment of Experimental Psychology, Cognitive Processes and Speec, Complutense University of Madrid, Madrid, Spain.ORCID 0000-0001-5294-4407
Pedro GilInstitute of Sanitary Investigation [IdISSC], San Carlos University Hospital, Madrid, Spain.
Fernando MaestúDepartment of Experimental Psychology, Cognitive Processes and Speec, Complutense University of Madrid, Madrid, Spain.
Javier M BuldúGISC & Laboratory of Biological Networks, Center for Biomedical Technology, Universidad Politécnica de Madrid, Madrid, Spain.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We investigated how the organization of functional brain networks was related to cognitive reserve (CR) during a memory task in healthy aging. We obtained the magnetoencephalographic functional networks of 20 elders with a high or low CR level to analyse the differences at network features. We reported a negative correlation between synchronization of the whole network and CR, and observed differences both at the node and at the network level in: the average shortest path and the network outreach. Individuals with high CR required functional networks with lower links to successfully carry out the memory task. These results may indicate that those individuals with low CR level exhibited a dual pattern of compensation and network impairment, since their functioning was more energetically costly to perform the task as the high CR group. Additionally, we evaluated how the dynamical properties of the different brain regions were correlated to the network parameters obtaining that entropy was positively correlated with the strength and clustering coefficient, while complexity behaved conversely. Consequently, highly connected nodes of the functional networks showed a more stochastic and less complex signal. We consider that network approach may be a relevant tool to better understand brain functioning in aging.

Indexed as

AgedAged, 80 and overAgingBrainCognitive ReserveHealthy VolunteersHumansMagnetoencephalographyNerve Net

Identifiers

PMID30002460
PMCPMC6043549

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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.