Evidence map›Paper›PMID 25524710›Full record

ArticleBrain : a journal of neurology2015

Evidence for inhibitory deficits in the prefrontal cortex in schizophrenia.

Natasha Radhu, Luis Garcia Dominguez, Faranak Farzan, Margaret A Richter, Mawahib O Semeralul, Robert Chen, Paul B Fitzgerald, Zafiris J Daskalakis

Open access · bronzeAbstract read
In one paragraph

Article in Brain : a journal of neurology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 44 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed, 4 pooled it
5.8field-weighted citation impact, top 4% 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

44 citing papers in PubMed, 4 syntheses or guidelines pooled it, 96 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Pharmacological Manipulation of Cortical Inhibition in the Dorsolateral Prefrontal Cortex.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2018
    Trial
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  18. The evolutionary origin of psychosis.Frontiers in psychiatry · 2023
    Article
  19. Identifying transcranial magnetic stimulation induced EEG signatures of different neuronal elements in primary motor cortex.Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology · 2022
    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

8 authors at 1 institution in 1 country.

Natasha Radhu1 Temerty Centre for Therapeutic Brain Intervention, Centre for Addiction and Mental Health, University of Toronto, Toronto, Ontario, Canada.
Luis Garcia Dominguez1 Temerty Centre for Therapeutic Brain Intervention, Centre for Addiction and Mental Health, University of Toronto, Toronto, Ontario, Canada.
Faranak Farzan1 Temerty Centre for Therapeutic Brain Intervention, Centre for Addiction and Mental Health, University of Toronto, Toronto, Ontario, Canada.
Margaret A Richter2 Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada.
Mawahib O Semeralul1 Temerty Centre for Therapeutic Brain Intervention, Centre for Addiction and Mental Health, University of Toronto, Toronto, Ontario, Canada.
Robert Chen3 Division of Neurology, Toronto Western Research Institute, University of Toronto, Toronto, Ontario, Canada.
Paul B Fitzgerald4 Monash Alfred Psychiatry Research Centre, The Alfred and Monash University Central Clinical School, Victoria, Australia.
Zafiris J Daskalakis1 Temerty Centre for Therapeutic Brain Intervention, Centre for Addiction and Mental Health, University of Toronto, Toronto, Ontario, Canada Jeff.Daskalakis@camh.ca.
Sunnybrook Health Science Centre · CA

Funding

Canadian Institutes of Health Research
6 · The paper itself

Abstract

Abnormal gamma-aminobutyric acid inhibitory neurotransmission is a key pathophysiological mechanism underlying schizophrenia. Transcranial magnetic stimulation can be combined with electroencephalography to index long-interval cortical inhibition, a measure of GABAergic receptor-mediated inhibitory neurotransmission from the frontal and motor cortex. In previous studies we have reported that schizophrenia is associated with inhibitory deficits in the dorsolateral prefrontal cortex compared to healthy subjects and patients with bipolar disorder. The main objective of the current study was to replicate and extend these initial findings by evaluating long-interval cortical inhibition from the dorsolateral prefrontal cortex in patients with schizophrenia compared to patients with obsessive-compulsive disorder. A total of 111 participants were assessed: 38 patients with schizophrenia (average age: 35.71 years, 25 males, 13 females), 27 patients with obsessive-compulsive disorder (average age: 36.15 years, 11 males, 16 females) and 46 healthy subjects (average age: 33.63 years, 23 females, 23 males). Long-interval cortical inhibition was measured from the dorsolateral prefrontal cortex and motor cortex through combined transcranial magnetic stimulation and electroencephalography. In the dorsolateral prefrontal cortex, long-interval cortical inhibition was significantly reduced in patients with schizophrenia compared to healthy subjects (P = 0.004) and not significantly different between patients with obsessive-compulsive disorder and healthy subjects (P = 0.5445). Long-interval cortical inhibition deficits in the dorsolateral prefrontal cortex were also significantly greater in patients with schizophrenia compared to patients with obsessive-compulsive disorder (P = 0.0465). There were no significant differences in long-interval cortical inhibition across all three groups in the motor cortex. These results demonstrate that long-interval cortical inhibition deficits in the dorsolateral prefrontal cortex are specific to patients with schizophrenia and are not a generalized deficit that is shared by disorders of severe psychopathology.

Indexed as

Inhibition, PsychologicalSchizophrenic PsychologyAdultAnatomy, Cross-SectionalAntipsychotic AgentsElectroencephalographyElectromyographyFemaleHumansMaleMotor CortexObsessive-Compulsive DisorderPrefrontal CortexPsychiatric Status Rating ScalesSchizophreniaTranscranial Magnetic StimulationAntipsychotic Agentscoritcal inhibitiondorsolateral prefrontal cortexelectroencephalographygamma oscillationsobsessive-compulsive disorderschizophreniatranscranial magnetic stimulation

Identifiers

PMID25524710
PMCPMC4306823
OpenAlexW2120019053

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.