Evidence map›Paper›PMID 21276242›Full record

ArticleBMC psychiatry2011

Pattern of neural responses to verbal fluency shows diagnostic specificity for schizophrenia and bipolar disorder.

Sergi G Costafreda, Cynthia H Y Fu, Marco Picchioni, Timothea Toulopoulou, Colm McDonald, Eugenia Kravariti, Muriel Walshe, Diana Prata, Robin M Murray, Philip K McGuire

Open access · goldAbstract read
In one paragraph

Article in BMC psychiatry, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 82 papers, 6 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
82citing papers in PubMed, 6 pooled it
6.9field-weighted citation impact, top 2% 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

82 citing papers in PubMed, 6 syntheses or guidelines pooled it, 185 citations in OpenAlex.

  1. Pooled it
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  6. Detecting neuroimaging biomarkers for schizophrenia: a meta-analysis of multivariate pattern recognition studies.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2015
    Pooled it
  7. Trial
  8. Effects of ketamine-induced psychopathological symptoms on continuous overt rhyme fluency.European archives of psychiatry and clinical neuroscience · 2012
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22 more citing papers are in PubMed but not listed here.

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

10 authors at 1 institution in 1 country.

Sergi G CostafredaInstitute of Psychiatry, King's College London, De Crespigny Park, London UK. sergi.1.costafreda@kcl.ac.uk
Cynthia H Y Fu
Marco Picchioni
Timothea Toulopoulou
Colm McDonald
Eugenia Kravariti
Muriel Walshe
Diana Prata
Robin M Murray
Philip K McGuire
King's College London · GB

Funding

Medical Research Council G0300977Medical Research Council G0802594Medical Research Council G90/96
6 · The paper itself

Abstract

backgroundImpairments in executive function and language processing are characteristic of both schizophrenia and bipolar disorder. Their functional neuroanatomy demonstrate features that are shared as well as specific to each disorder. Determining the distinct pattern of neural responses in schizophrenia and bipolar disorder may provide biomarkers for their diagnoses.

methods104 participants underwent functional magnetic resonance imaging (fMRI) scans while performing a phonological verbal fluency task. Subjects were 32 patients with schizophrenia in remission, 32 patients with bipolar disorder in an euthymic state, and 40 healthy volunteers. Neural responses to verbal fluency were examined in each group, and the diagnostic potential of the pattern of the neural responses was assessed with machine learning analysis.

resultsDuring the verbal fluency task, both patient groups showed increased activation in the anterior cingulate, left dorsolateral prefrontal cortex and right putamen as compared to healthy controls, as well as reduced deactivation of precuneus and posterior cingulate. The magnitude of activation was greatest in patients with schizophrenia, followed by patients with bipolar disorder and then healthy individuals. Additional recruitment in the right inferior frontal and right dorsolateral prefrontal cortices was observed in schizophrenia relative to both bipolar disorder and healthy subjects. The pattern of neural responses correctly identified individual patients with schizophrenia with an accuracy of 92%, and those with bipolar disorder with an accuracy of 79% in which mis-classification was typically of bipolar subjects as healthy controls.

conclusionsIn summary, both schizophrenia and bipolar disorder are associated with altered function in prefrontal, striatal and default mode networks, but the magnitude of this dysfunction is particularly marked in schizophrenia. The pattern of response to verbal fluency is highly diagnostic for schizophrenia and distinct from bipolar disorder. Pattern classification of functional MRI measurements of language processing is a potential diagnostic marker of schizophrenia.

Indexed as

AdultBipolar DisorderBrainBrain MappingCerebral CortexCognition DisordersFemaleHumansMagnetic Resonance ImagingMaleNeuropsychological TestsPrefrontal CortexSchizophreniaSchizophrenic PsychologySensitivity and SpecificitySpeech Disorders

Identifiers

PMID21276242
PMCPMC3042380
OpenAlexW2160976404

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.