Evidence map›Paper›PMID 30255629›Full record

SynthesisNeuropsychopharmacology reports2018

Hippocampal subregion abnormalities in schizophrenia: A systematic review of structural and physiological imaging studies.

Soichiro Nakahara, Mitsuyuki Matsumoto, Theo G M van Erp

Abstract readSystematic Review
In one paragraph

Synthesis in Neuropsychopharmacology reports, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed, 3 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

51 citing papers in PubMed, 3 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Trial
  5. Review
  6. Synergistic pathways to psychosis: understanding developmental risk and resilience factors.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2026
    Review
  7. Article
  8. Neural and somatic mechanisms driving clinical improvements in post-acute schizophrenia spectrum disorders.European psychiatry : the journal of the Association of European Psychiatrists · 2025
    Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Hippocampal subfields in remitted schizophrenia.Journal of the Chinese Medical Association : JCMA · 2024
    Article
  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

3 authors.

Soichiro NakaharaClinical Translational Neuroscience Laboratory, Department of Psychiatry and Human Behavior, University of California Irvine, Irvine, California.
Mitsuyuki MatsumotoDrug Discovery Research, Astellas Pharma Inc., Tsukuba, Japan.
Theo G M van ErpClinical Translational Neuroscience Laboratory, Department of Psychiatry and Human Behavior, University of California Irvine, Irvine, California.ORCID 0000-0002-2465-2797

Funding

High-resolution Functional Imaging of Hippocampal Subfields in SchizophreniaR21MH097196 · NIMH · UNIVERSITY OF CALIFORNIA-IRVINE · PI VAN ERP, THEODORUS G.M. · 2012 to 2013
$335k
NIMH NIH HHS 5R21MH097196NIMH NIH HHS R21 MH097196
6 · The paper itself

Abstract

aimThe hippocampus is considered a key region in schizophrenia pathophysiology, but the nature of hippocampal subregion abnormalities and how they contribute to disease expression remain to be fully determined. This study reviews findings from schizophrenia hippocampal subregion volumetric and physiological imaging studies published within the last decade.

methodsThe PubMed database was searched for publications on hippocampal subregion volume and physiology abnormalities in schizophrenia and their findings were reviewed.

resultsThe main replicated findings include smaller CA1 volumes and CA1 hyperactivation in schizophrenia, which may be predictive of conversion in individuals at clinical high risk of psychosis, smaller CA1 and CA4/DG volumes in first-episode schizophrenia, and more widespread smaller hippocampal subregion volumes with longer duration of illness. Several studies have reported relationships between hippocampal subregion volumes and declarative memory or symptom severity.

conclusionsTogether these studies provide support for hippocampal formation circuitry models of schizophrenia. These initial findings must be taken with caution as the scientific community is actively working on hippocampal subregion method improvement and validation. Further improvements in our understanding of the nature of hippocampal formation subregion involvement in schizophrenia will require the collection of structural and physiological imaging data at submillimeter voxel resolution, standardization and agreement of atlases, adequate control for possible confounding factors, and multi-method validation of findings. Despite the need for cautionary interpretation of the initial findings, we believe that improved localization of hippocampal subregion abnormalities in schizophrenia holds promise for the identification of disease contributing mechanisms.

Indexed as

Magnetic Resonance ImagingHippocampusHumansSchizophreniaCA1dentate gyrushippocampuspsychosissubfield

Identifiers

PMID30255629
PMCPMC7021222

What OpenQuestion holds

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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.