Evidence map›Paper›PMID 34642454›Full record

SynthesisMolecular psychiatry2022

Structural gray matter differences in Problematic Usage of the Internet: a systematic review and meta-analysis.

Jeremy E Solly, Roxanne W Hook, Jon E Grant, Samuele Cortese, Samuel R Chamberlain

Open access · hybridAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Molecular psychiatry, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 3 pooled it
12.5field-weighted citation impact, top 1% 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

19 citing papers in PubMed, 3 syntheses or guidelines pooled it, 53 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Article
  5. Review
  6. Independent brain cortical signatures of risk for adolescent cannabis use and consequences of such use are moderated by sex.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2026
    Article
  7. Article
  8. Microbes Saving Lives and Reducing Suffering.Microbial biotechnology · 2025
    Article
  9. Similarities and Differences in Neuroimaging.Advances in experimental medicine and biology · 2025
    Review
  10. Article
  11. Connectome-based predictive modeling of Internet addiction symptomatology.Social cognitive and affective neuroscience · 2024
    Article
  12. Article
  13. Article
  14. Review
  15. Article
  16. The Mediatory Role of the Boredom and Loneliness Dimensions in the Development of Problematic Internet Use.International journal of environmental research and public health · 2023
    Article
  17. Article
  18. Article
  19. 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 at 3 institutions in 2 countries.

Jeremy E SollyCambridge University Hospitals NHS Foundation Trust, Cambridge, UK. solly.j@doctors.org.uk.ORCID http://orcid.org/0000-0003-1401-5919
Roxanne W HookDepartment of Psychiatry, University of Cambridge, Cambridge, UK.
Jon E GrantDepartment of Psychiatry, University of Chicago, Pritzker School of Medicine, Chicago, IL, USA.
Samuele CorteseCentre for Innovation in Mental Health, School of Psychology, Faculty of Environmental and Life Sciences, University of Southampton, Southampton, UK.
Samuel R ChamberlainDepartment of Psychiatry, University of Cambridge, Cambridge, UK.ORCID http://orcid.org/0000-0001-7014-8121
University of Cambridge · GBUniversity of Chicago · USUniversity of Nottingham · GB

Funding

Wellcome Trust 110049
6 · The paper itself

Abstract

Problematic Usage of the Internet (PUI) has been linked to diverse structural gray matter changes in individual data studies. However, no quantitative synthesis across studies has been conducted. We aimed to identify gray matter regions showing significant spatial convergence across neuroimaging studies in PUI. We searched PubMed and PsycINFO up to 10/03/2021 and included original, cross-sectional comparative studies that examined structural gray matter imaging in PUI versus control groups; reported a whole-brain analysis; and provided peak coordinates for gray matter differences. From a total of 624 potentially relevant studies, 15 (including 355 individuals with PUI and 363 controls) were included in a meta-analysis of voxel-based morphometry studies. Anatomical likelihood estimation (ALE) meta-analysis was performed using extracted coordinates and identified significant spatial convergence in the medial/superior frontal gyri, the left anterior cingulate cortex/cingulate gyrus, and the left middle frontal/precentral gyri. Datasets contributing to these findings all indicated reduced gray matter in cases compared to controls. In conclusion, voxel-based morphometric studies indicate replicable gray matter reductions in the dorsolateral prefrontal cortex and anterior cingulate cortex in PUI, regions implicated in reward processing and top-down inhibitory control. Further studies are required to understand the nature of gray matter differences across PUI behaviors, as well as the contribution of particular mental health disorders, and the influence of variation in study and sample characteristics.

Indexed as

Gray MatterMagnetic Resonance ImagingBrainCerebral CortexCross-Sectional StudiesHumansInternet

Identifiers

PMID34642454
PMCPMC9054652
OpenAlexW3206293803

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.