Evidence map›Paper›PMID 35229388›Full record

SynthesisThe European journal of neuroscience2022

Cortical complexity estimation using fractal dimension: A systematic review of the literature on clinical and nonclinical samples.

Valentina Meregalli, Francesco Alberti, Christopher R Madan, Paolo Meneguzzo, Alessandro Miola, Nicolò Trevisan, Fabio Sambataro, Angela Favaro, Enrico Collantoni

Abstract readSystematic Review
In one paragraph

Synthesis in The European journal of neuroscience, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 2 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

30 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Cortical complexity in eating disorders: a systematic review and qualitative synthesis.European archives of psychiatry and clinical neuroscience · 2026
    Pooled it
  2. Pooled it
  3. Observational
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Neural correlates of inattention in adults with ADHD.European archives of psychiatry and clinical neuroscience · 2025
    Article
  15. Review
  16. Article
  17. Article
  18. Article
  19. Article
  20. 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.

Valentina MeregalliDepartment of Neurosciences, University of Padua, Padova, Italy.ORCID 0000-0003-0016-1237
Francesco AlbertiDepartment of Neurosciences, University of Padua, Padova, Italy.ORCID 0000-0001-5732-8224
Christopher R MadanSchool of Psychology, University of Nottingham, Nottingham, UK.ORCID 0000-0003-3228-6501
Paolo MeneguzzoDepartment of Neurosciences, University of Padua, Padova, Italy.ORCID 0000-0003-3323-6071
Alessandro MiolaDepartment of Neurosciences, University of Padua, Padova, Italy.ORCID 0000-0002-2513-2718
Nicolò TrevisanDepartment of Neurosciences, University of Padua, Padova, Italy.ORCID 0000-0003-4486-0718
Fabio SambataroDepartment of Neurosciences, University of Padua, Padova, Italy.ORCID 0000-0003-2102-416X
Angela FavaroDepartment of Neurosciences, University of Padua, Padova, Italy.ORCID 0000-0002-6540-5194
Enrico CollantoniDepartment of Neurosciences, University of Padua, Padova, Italy.ORCID 0000-0002-6730-1778

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Fractal geometry has recently been proposed as a useful tool for characterizing the complexity of the brain cortex, which is likely to derive from the recurrence of sulci-gyri convolution patterns. The index used to describe the cortical complexity is called fractal dimensional (FD) and was employed by different research exploring the neurobiological correlates of distinct pathological and nonpathological conditions. This review aims to describe the literature on the application of this index, summarize the heterogeneities between studies and inform future research on this topic. Sixty-two studies were included in the systematic review. The main research lines concern neurodevelopment, aging and the neurobiology of specific psychiatric and neurological disorders. Overall, the included papers indicate that cortical complexity is likely to reduce during aging and in various pathological processes affecting the brain. Nevertheless, the high heterogeneity between studies strongly prevents the possibility of drawing conclusions. Further research considering this index besides other morphological values is needed to better clarify the role of FD in characterizing the cortical structure.

Indexed as

FractalsMagnetic Resonance ImagingBraincortical complexitycortical structurefractal dimensionMRI

Identifiers

PMID35229388
PMCPMC9313853

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.