Evidence map›Paper›PMID 30528746›Full record

ArticleBiological psychiatry2019

The Hippocampus in Depression: More Than the Sum of Its Parts? Advanced Hippocampal Substructure Segmentation in Depression.

Darren W Roddy, Chloe Farrell, Kelly Doolin, Elena Roman, Leonardo Tozzi, Thomas Frodl, Veronica O'Keane, Erik O'Hanlon

Abstract read
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In one paragraph

Article in Biological psychiatry, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 163 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
163citing papers in PubMed, 6 pooled it
8.3field-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

163 citing papers in PubMed, 6 syntheses or guidelines pooled it, 271 citations in OpenAlex.

  1. Pooled it
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  7. Semantic encoding of trauma memories in the hippocampus among individuals with PTSD.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2026
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  15. Trials, trips, and tribulations: pathways for implementing psychedelic therapy in Ireland.The international journal of neuropsychopharmacology · 2026
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103 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors at 4 institutions in 2 countries.

Darren W RoddyDepartment of Psychiatry, Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland; Department of Physiology, School of Medicine, University College Dublin, Dublin, Ireland. Electronic address: dwroddy@tcd.ie.
Chloe FarrellDepartment of Psychiatry, Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland.
Kelly DoolinDepartment of Psychiatry, Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland.
Elena RomanDepartment of Psychiatry, Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland.
Leonardo TozziDepartment of Psychiatry and Psychotherapy, Otto von Guericke University Magdeburg, Magdeburg, Germany.
Thomas FrodlDepartment of Psychiatry, Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland; Department of Psychiatry and Psychotherapy, Otto von Guericke University Magdeburg, Magdeburg, Germany.
Veronica O'KeaneDepartment of Psychiatry, Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland.
Erik O'HanlonDepartment of Psychiatry, Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland; Department of Psychiatry, Royal College of Surgeons in Ireland, Education and Research Centre, Beaumont Hospital, Dublin, Ireland.
Trinity College Dublin · IEOtto-von-Guericke-Universität Magdeburg · DERoyal College of Surgeons in Ireland · IEUniversity College Dublin · IE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundHippocampal volume reduction is the most replicated finding in neuroimaging studies of major depressive disorder (MDD). Varying hippocampal volume definition is a well-established problem in this field. Given that hippocampal function can be mapped onto anatomically defined substructures and that detailed examination of substructure volumes is now possible, we examined different hippocampal composite measures in MDD to look for hippocampal markers of MDD.

methodsMagnetic resonance imaging brain scans were compared between 80 patients with a range of MDD duration and 83 healthy control subjects. High-resolution T1-weighted and T2-weighted-fluid-attenuated inversion recovery magnetic resonance images were examined using the automated hippocampal substructure module in FreeSurfer 6.0. Between-group volumetric assessments were performed at substructure and composite substructures levels.

resultsPatients with MDD showed a bilateral pattern of volume reduction in principal hippocampal substructures: the cornu ammonis (CA1-CA4), dentate gyrus, and subiculum. Changes were more pronounced on the left of these structures and in recurrent depression. CA2 to CA4 were the only substructures reduced in first-presentation depression. Overall changes were most marked in the left CA1, and CA1 volume was a predictor of illness duration.

conclusionsHippocampal involvement in MDD is confined to principal substructures only. Differences between patients with MDD and healthy control subjects increased with progressively restricted hippocampal definitions, with the left CA1 emerging as a potential marker of MDD. Changes were more extensive in patients with recurrent, as opposed to first-presentation, MDD, suggesting a hippocampal disease process. These findings identify core hippocampal regions in the pathology of MDD, suggesting a potential marker of disease progression in MDD.

Indexed as

AdolescentAdultAtrophyCase-Control StudiesDominance, CerebralFemaleHippocampusHumansMagnetic Resonance ImagingMajor Depressive DisorderMaleMiddle AgedNeuroimagingYoung AdultDepressionFirst-presentationFreeSurferHippocampusRecurrentSubstructure

Identifiers

PMID30528746
OpenAlexW2892030795

What OpenQuestion holds

Textmetadata
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Registered trials

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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.