Evidence map›Paper›PMID 33658524›Full record

ArticleNPJ schizophrenia2021

Functional connectivity abnormalities of the long-axis hippocampal subregions in schizophrenia during episodic memory.

Jules R Dugré, Alexandre Dumais, Andras Tikasz, Adriana Mendrek, Stéphane Potvin

Open access · goldAbstract read
In one paragraph

Article in NPJ schizophrenia, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
1.7field-weighted citation impact, top 18% 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

14 citing papers in PubMed, 24 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

5 authors at 3 institutions in 1 country.

Jules R DugréCentre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada.ORCID http://orcid.org/0000-0003-4946-0350
Alexandre DumaisCentre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada.
Andras TikaszCentre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada.
Adriana MendrekCentre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada.
Stéphane PotvinCentre de Recherche de l'Institut Universitaire en Santé Mentale de Montréal, Montreal, QC, Canada. stephane.potvin@umontreal.ca.ORCID http://orcid.org/0000-0003-1624-378X
Institut Universitaire en Santé Mentale de Québec · CABishop's University · CAInstitut national de psychiatrie légale Philippe-Pinel · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Past evidence suggests that hippocampal subregions, namely the anterior and posterior parts, may be engaged in distinct networks underlying the memory functions which may be altered in patients with schizophrenia. However, of the very few studies that have investigated the hippocampal longitudinal axis subdivisions functional connectivity in patients with schizophrenia, the majority was based on resting-state data, and yet, none aimed to examine these during an episodic memory task. A total of 41 patients with schizophrenia and 45 healthy controls were recruited for a magnetic resonance imaging protocol in which they performed an explicit memory task. Seed-based functional connectivity analysis was employed to assess connectivity abnormalities between hippocampal subregions and voxel-wise connectivity targets in patients with schizophrenia. We observed a significantly reduced connectivity between the posterior hippocampus and regions from the default mode network, but increased connectivity with the primary visual cortex, in patients with schizophrenia compared to healthy subjects. Increased connectivity between the anterior hippocampus and anterior temporal regions also characterized patients with schizophrenia. In the current study, we provided evidence and support for studying hippocampal subdivisions along the longitudinal axis in schizophrenia. Our results suggest that the abnormalities in hippocampal subregions functional connectivity reflect deficits in episodic memory that may be implicated in the pathophysiology of schizophrenia.

Identifiers

PMID33658524
PMCPMC7930183
OpenAlexW3134490357

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.