Evidence map›Paper›PMID 28578129›Full record

ArticleNeuroImage2017

Assessing dynamic functional connectivity in heterogeneous samples.

B C L Lehmann, S R White, R N Henson, Cam-Can, L Geerligs

Abstract read
In one paragraph

Article in NeuroImage, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
–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

18 citing papers in PubMed.

  1. Review
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Review
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. 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

5 authors.

B C L LehmannMedical Research Council (MRC) Biostatistics Unit, Cambridge CB2 0SR, United Kingdom. Electronic address: brieuc.lehmann@mrc-bsu.cam.ac.uk.
S R WhiteMedical Research Council (MRC) Biostatistics Unit, Cambridge CB2 0SR, United Kingdom.
R N HensonMedical Research Council (MRC) Cognition and Brain Sciences Unit, Cambridge CB2 7EF, United Kingdom.
Cam-CanCambridge Centre for Ageing and Neuroscience (Cam-CAN), University of Cambridge, United Kingdom.
L GeerligsMedical Research Council (MRC) Cognition and Brain Sciences Unit, Cambridge CB2 7EF, United Kingdom; Donders Institute for Brain, Cognition and Behaviour, Radboud University, The Netherlands.

Funding

Biotechnology and Biological Sciences Research Council BB/H008217/1Medical Research Council MC-A060-5PR10Medical Research Council MC_U105292687Medical Research Council MC_U105579226Medical Research Council MC_U105597119Medical Research Council MC_UU_00002/12Medical Research Council MC_UU_00005/12Medical Research Council MC_UU_00005/8
6 · The paper itself

Abstract

Several methods have been developed to measure dynamic functional connectivity (dFC) in fMRI data. These methods are often based on a sliding-window analysis, which aims to capture how the brain's functional organization varies over the course of a scan. The aim of many studies is to compare dFC across groups, such as younger versus older people. However, spurious group differences in measured dFC may be caused by other sources of heterogeneity between people. For example, the shape of the haemodynamic response function (HRF) and levels of measurement noise have been found to vary with age. We use a generic simulation framework for fMRI data to investigate the effect of such heterogeneity on estimates of dFC. Our findings show that, despite no differences in true dFC, individual differences in measured dFC can result from other (non-dynamic) features of the data, such as differences in neural autocorrelation, HRF shape, connectivity strength and measurement noise. We also find that common dFC methods such as k-means and multilayer modularity approaches can detect spurious group differences in dynamic connectivity due to inappropriate setting of their hyperparameters. fMRI studies therefore need to consider alternative sources of heterogeneity across individuals before concluding differences in dFC.

Indexed as

Data Interpretation, StatisticalComputer SimulationConnectomeHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingNeurovascular CouplingDynamic functional connectivityFMRIGroup studiesResting state

Identifiers

PMID28578129
PMCPMC5590721

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.