Evidence map›Paper›PMID 33703869›Full record

ArticleJournal of psychiatry & neuroscience : JPN2021

Reduced visual contrast suppression during major depressive episodes.

Viljami Salmela, Lumikukka Socada, John Söderholm, Roope Heikkilä, Jari Lahti, Jesper Ekelund, Erkki Isometsä

Open access · diamondAbstract read
In one paragraph

Article in Journal of psychiatry & neuroscience : JPN, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed, 3 pooled it
4.0field-weighted citation impact, top 5% 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

26 citing papers in PubMed, 3 syntheses or guidelines pooled it, 47 citations in OpenAlex.

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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.

Viljami SalmelaFrom the Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Helsinki, Finland (Salmela, Lahti); and the Department of Psychiatry, University of Helsinki and Helsinki University Hospital, Helsinki, Finland (Socada, Söderholm, Heikkilä, Ekelund, Isometsä).
Lumikukka SocadaFrom the Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Helsinki, Finland (Salmela, Lahti); and the Department of Psychiatry, University of Helsinki and Helsinki University Hospital, Helsinki, Finland (Socada, Söderholm, Heikkilä, Ekelund, Isometsä).
John SöderholmFrom the Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Helsinki, Finland (Salmela, Lahti); and the Department of Psychiatry, University of Helsinki and Helsinki University Hospital, Helsinki, Finland (Socada, Söderholm, Heikkilä, Ekelund, Isometsä).
Roope HeikkiläFrom the Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Helsinki, Finland (Salmela, Lahti); and the Department of Psychiatry, University of Helsinki and Helsinki University Hospital, Helsinki, Finland (Socada, Söderholm, Heikkilä, Ekelund, Isometsä).
Jari LahtiFrom the Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Helsinki, Finland (Salmela, Lahti); and the Department of Psychiatry, University of Helsinki and Helsinki University Hospital, Helsinki, Finland (Socada, Söderholm, Heikkilä, Ekelund, Isometsä).
Jesper EkelundFrom the Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Helsinki, Finland (Salmela, Lahti); and the Department of Psychiatry, University of Helsinki and Helsinki University Hospital, Helsinki, Finland (Socada, Söderholm, Heikkilä, Ekelund, Isometsä).
Erkki IsometsäFrom the Department of Psychology and Logopedics, Faculty of Medicine, University of Helsinki, Helsinki, Finland (Salmela, Lahti); and the Department of Psychiatry, University of Helsinki and Helsinki University Hospital, Helsinki, Finland (Socada, Söderholm, Heikkilä, Ekelund, Isometsä).
University of Helsinki · FIHelsinki University Hospital · FI

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Background: Previous studies have suggested that processing of visual contrast information could be altered in major depressive disorder. To clarify the changes at different levels of the visual hierarchy, we behaviourally measured contrast perception in 2 centre-surround conditions, assessing retinal and cortical processing. Methods: As part of a prospective cohort study, our sample consisted of controls (n = 29; 21 female) and patients with unipolar depression, bipolar disorder and borderline personality disorder who had baseline major depressive episodes (n = 111; 74 female). In a brightness induction test that assessed retinal processing, participants compared the perceived luminance of uniform patches (presented on a computer screen) as the luminance of the backgrounds was varied. In a contrast suppression test that assessed cortical processing, participants compared the perceived contrast of gratings, which were presented with collinearly or orthogonally oriented backgrounds. Results: Brightness induction was similar for patients with major depressive episodes and controls (p = 0.60, d = 0.115, Bayes factor = 3.9), but contrast suppression was significantly lower for patients than for controls (p < 0.006, d = 0.663, Bayes factor = 35.2). We observed no statistically significant associations between contrast suppression and age, sex, or medication or diagnostic subgroup. At follow-up (n = 74), we observed some normalization of contrast perception. Limitations: We assessed contrast perception using behavioural tests instead of electrophysiology. Conclusion: The reduced contrast suppression we observed may have been caused by decreased retinal feedforward or cortical feedback signals. Because we observed intact brightness induction, our results suggest normal retinal but altered cortical processing of visual contrast during a major depressive episode. This alteration is likely to be present in multiple types of depression and to partially normalize upon remission.

Indexed as

Visual PerceptionAdolescentAdultBayes TheoremBipolar DisorderBorderline Personality DisorderFemaleHumansMajor Depressive DisorderMaleMiddle AgedProspective StudiesYoung Adult

Identifiers

PMID33703869
PMCPMC8061742
OpenAlexW3134552258

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.