Evidence map›Paper›PMID 33110410›Full record

ArticleFrontiers in psychiatry2020

Abnormal Spontaneous Gamma Power Is Associated With Verbal Learning and Memory Dysfunction in Schizophrenia.

Kumiko Tanaka-Koshiyama, Daisuke Koshiyama, Makoto Miyakoshi, Yash B Joshi, Juan L Molina, Joyce Sprock, David L Braff, Gregory A Light

Open access · goldAbstract read
In one paragraph

Article in Frontiers in psychiatry, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed, 1 pooled it
3.3field-weighted citation impact, top 7% 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

33 citing papers in PubMed, 1 synthesis or guideline pooled it, 68 citations in OpenAlex.

  1. Pooled it
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  6. Effects of NMDA receptor antagonists on working memory and gamma oscillations, and the mediating role of the GluN2D subunit.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2025
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  8. Abnormal spontaneous activity and rest-task shift in schizophrenia.Psychiatry and clinical neurosciences · 2025
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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

8 authors at 2 institutions in 2 countries.

Kumiko Tanaka-KoshiyamaDepartment of Psychiatry, University of California San Diego, La Jolla, CA, United States.
Daisuke KoshiyamaDepartment of Psychiatry, University of California San Diego, La Jolla, CA, United States.
Makoto MiyakoshiSwartz Center for Neural Computation, University of California San Diego, La Jolla, CA, United States.
Yash B JoshiDepartment of Psychiatry, University of California San Diego, La Jolla, CA, United States.
Juan L MolinaDepartment of Psychiatry, University of California San Diego, La Jolla, CA, United States.
Joyce SprockDepartment of Psychiatry, University of California San Diego, La Jolla, CA, United States.
David L BraffDepartment of Psychiatry, University of California San Diego, La Jolla, CA, United States.
Gregory A LightDepartment of Psychiatry, University of California San Diego, La Jolla, CA, United States.
University of California, San Diego · USMental Illness Research, Education and Clinical Centers · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundSchizophrenia patients exhibit cognitive deficits across multiple domains, including verbal memory, working memory, and executive function, which substantially contribute to psychosocial disability. Gamma oscillations are associated with a wide range of cognitive operations, and are important for cortico-cortical transmission and the integration of information across neural networks. While previous reports have shown that schizophrenia patients have selective impairments in the ability to support gamma oscillations in response to 40-Hz auditory stimulation, it is unclear if patients show abnormalities in gamma power at rest, or whether resting-state activity in other frequency bands is associated with cognitive functioning in schizophrenia patients.

methodsResting-state electroencephalogram (EEG) was assessed over 3 min in 145 healthy comparison subjects and 157 schizophrenia patients. Single-word reading ability was measured

resultsSchizophrenia patients showed normal levels of delta-band power but abnormally elevated EEG power in theta, alpha, beta, and gamma bands. An exploratory correlation analysis showed a significant negative correlation of gamma-band power and verbal learning performance in schizophrenia patients.

conclusionsPatients with schizophrenia have abnormal resting-state EEG power across multiple frequency bands; gamma-band abnormalities were selectively and negatively associated with impairments in verbal learning. Resting-state gamma-band EEG power may be useful for understanding the pathophysiology of cognitive dysfunction and developing novel therapeutics in schizophrenia patients.

Indexed as

cognitive functionmemoryresting-state electroencephalography (EEG)schizophreniaspontaneous gamma oscillationtranslational biomarkerverbal learning

Identifiers

PMID33110410
PMCPMC7488980
OpenAlexW3081913112

What OpenQuestion holds

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LicenceCC BY
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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.