Evidence map›Paper›PMID 28372326›Full record

Trial reportJournal of Alzheimer's disease : JAD2017

Does Functional Connectivity Provide a Marker for Cognitive Rehabilitation Effects in Alzheimer's Disease? An Interventional Study.

Sina Ochmann, Martin Dyrba, Michel J Grothe, Elisabeth Kasper, Steffi Webel, Karlheinz Hauenstein, Stefan J Teipel

Open access · hybridAbstract readClinical Trial
In one paragraph

Trial report in Journal of Alzheimer's disease : JAD, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 2 pooled it
1.2field-weighted citation impact, top 23% 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

8 citing papers in PubMed, 2 syntheses or guidelines pooled it, 16 citations in OpenAlex.

  1. Pooled it
  2. Cognitive training for people with mild to moderate dementia.The Cochrane database of systematic reviews · 2019
    Pooled it
  3. Article
  4. Article
  5. Review
  6. Article
  7. Review
  8. 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

7 authors at 2 institutions in 1 country.

Sina OchmannDZNE, German Center for Neurodegenerative Diseases, Site Rostock/Greifswald, Germany.
Martin DyrbaDZNE, German Center for Neurodegenerative Diseases, Site Rostock/Greifswald, Germany.
Michel J GrotheDZNE, German Center for Neurodegenerative Diseases, Site Rostock/Greifswald, Germany.
Elisabeth KasperDZNE, German Center for Neurodegenerative Diseases, Site Rostock/Greifswald, Germany.
Steffi WebelDZNE, German Center for Neurodegenerative Diseases, Site Rostock/Greifswald, Germany.
Karlheinz HauensteinInstitute of Diagnostic and Interventional Radiology, University Medicine Rostock, Rostock, Germany.
Stefan J TeipelDZNE, German Center for Neurodegenerative Diseases, Site Rostock/Greifswald, Germany.
German Center for Neurodegenerative Diseases · DEUniversity of Rostock · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundCognitive rehabilitation (CR) is a cognitive intervention for patients with Alzheimer's disease (AD) that aims to maintain everyday competences. The analysis of functional connectivity (FC) in resting-state functional MRI has been used to investigate the effects of cognitive interventions.

objectivesWe evaluated the effect of CR on the default mode network FC in a group of patients with mild AD, compared to an active control group.

methodsWe performed a three-month interventional study including 16 patients with a diagnosis of AD. The intervention group (IG) consisted of eight patients, performing twelve sessions of CR. The active control group (CG) performed a standardized cognitive training. We used a seed region placed in the posterior cingulate cortex (PCC) for FC analysis, comparing scans acquired before and after the intervention. Effects were thresholded at a significance of p < 0.001 (uncorrected) and a minimal cluster size of 50 voxels.

resultsThe interaction of group by time showed a higher increase of PCC connectivity in IG compared to CG in the bilateral cerebellar cortex. CG revealed widespread, smaller clusters of higher FC increase compared with IG. Across all participants, an increase in quality of life was associated with connectivity increase over time in the bilateral precuneus.

conclusionsCR showed an effect on the FC of the DMN in the IG. These effects need further study in larger samples to confirm if FC analysis may suit as a surrogate marker for the effect of cognitive interventions in AD.

Indexed as

Neurological RehabilitationAgedAged, 80 and overAlzheimer DiseaseBrainBrain MappingCognitionFemaleFollow-Up StudiesHumansLinear ModelsLongitudinal StudiesMagnetic Resonance ImagingMaleMiddle AgedNeural PathwaysAlzheimer’s diseasecognitive rehabilitationdefault mode networkdementiafunctional connectivityfunctional MRI

Identifiers

PMID28372326
PMCPMC5409049
OpenAlexW2600434966

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.