Cited by 164Functional Brain Connectivity StudiesTreatment of Major DepressionNeural and Behavioral Psychology Studies

Neuronal connectivity in major depressive disorder: a systematic review

Open access
Helm, Katharina, Viol, Kathrin, Weiger, Thomas Martin, Tass, Peter A, Grefkes, Christian, del Monte, Damir, Schiepek, Günter·2018·Neuropsychiatric Disease and Treatment

Abstract

BACKGROUND: The causes of major depressive disorder (MDD), as one of the most common psychiatric disorders, still remain unclear. Neuroimaging has substantially contributed to understanding the putative neuronal mechanisms underlying depressed mood and motivational as well as cognitive impairments in depressed individuals. In particular, analyses addressing changes in interregional connectivity seem to be a promising approach to capture the effects of MDD at a systems level. However, a plethora of different, sometimes contradicting results have been published so far, making general conclusions difficult. Here we provide a systematic overview about connectivity studies published in the field over the last decade considering different methodological as well as clinical issues. METHODS: A systematic review was conducted extracting neuronal connectivity results from studies published between 2002 and 2015. The findings were summarized in tables and were graphically visualized. RESULTS: The review supports and summarizes the notion of an altered frontolimbic mood regulation circuitry in MDD patients, but also stresses the heterogeneity of the findings. The brain regions that are most consistently affected across studies are the orbitomedial prefrontal cortex, anterior cingulate cortex, amygdala, hippocampus, cerebellum and the basal ganglia. CONCLUSION: The results on connectivity in MDD are very heterogeneous, partly due to different methods and study designs, but also due to the temporal dynamics of connectivity. While connectivity research is an important step toward a complex systems approach to brain functioning, future research should focus on the dynamics of functional and effective connectivity.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.2147/ndt.s170989

Cites

115 of 115 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Many studies of functional connectivity in depression have involved relatively small numbers of participants and whole-brain regions.

    “A number of studies have provided evidence for different functional connectivities that may include the OFC, anterior cingulate cortex, amygdala and hippocampus, but many of these studies have involved relatively small numbers of participants, and whole-brain regions (Helm et al., 2018).”

    From The orbitofrontal cortex: reward, emotion and depression (2020) · cites this paper as Helm et al., 2018

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Research works printed but not linked: 2

  1. [31]Miller K Biomechanics of the Brain, Biological and Medical Physics, Biomedical Engineering New York Springer 2011
  2. [109]Kaiser RH Andrews-Hanna JR Wager TD Pizzagalli DA Large-Scale Network Dysfunction in Major Depressive Disorder JAMA Psychiatry 2015 72 6 603 611 25785575 PMC4456260

Cited by

Sorted by citations

Authors
Helm, K., Viol, K., Weiger, T. M., Tass, P. A., Grefkes, C., del Monte, D., & Schiepek, G.
Affiliations
  • University of Salzburg (AT)
  • Paracelsus Medical University (AT)
  • Stanford Medicine (US)
  • Forschungszentrum Jülich (DE)
Corresponding author
Schiepek, Günter
Venue
Neuropsychiatric Disease and Treatment
Published
2018-10
Volume
Volume 14
Pages
2715-2737
ISSN
  • 1176-6328 (ISSN-L)
  • 1178-2021
OpenAlex
W2896970273
Cited by
164
References
115
Citations by year
2026: 13 · 2025: 21 · 2024: 26 · 2023: 19 · 2022: 18 · 2021: 37 · 2020: 21 · 2019: 9
FWCI
2.24
Type
journal article
Language
en
Open access
Locations
  • Neuropsychiatric Disease and Treatment (publishedVersion, cc-by-nc)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
  • Kölner Universitäts PublikationsServer (Universität zu Köln) (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Dove Medical Press (Taylor and Francis Group) (submittedVersion, cc-by-nc)
  • ePLUS (submittedVersion)
  • Open access LMU (Ludwid Maxmilian's Universitat Munchen) (submittedVersion, cc-by-nc)
  • JuSER (Forschungszentrum Jülich) (submittedVersion, other-oa)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
Keywords
major depressive disorder, neuronal connectivity, interregional connectivity, mood regulation, anterior cingulate cortex, amygdala, hippocampus, cerebellum, basal ganglia, functional connectivity, effective connectivity

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review