Evidence map›Paper›PMID 24090512›Full record

ArticlePsychiatry research2013

Eyeblink conditioning in unmedicated schizophrenia patients: a positron emission tomography study.

Krystal L Parker, Nancy C Andreasen, Dawei Liu, John H Freeman, Daniel S O'Leary

Abstract read
In one paragraph

Article in Psychiatry research, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 2 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

16 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
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  8. Prediction, Psychosis, and the Cerebellum.Biological psychiatry. Cognitive neuroscience and neuroimaging · 2019
    Review
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  16. The therapeutic potential of the cerebellum in schizophrenia.Frontiers in systems neuroscience · 2014
    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

5 authors.

Krystal L ParkerDepartment of Psychiatry, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City IA 52242, USA. Electronic address: Krystallynn.parker@gmail.com.
Nancy C Andreasen
Dawei Liu
John H Freeman
Daniel S O'Leary

Funding

Testing Specificity of the Cognitive Dysmetria ModelR01MH040856 · NIMH · UNIVERSITY OF IOWA · PI ANDREASEN, NANCY C · 1985 to 2014
$6.9M
Structural imaging /neuroanatomy research unitP30MH043271 · NIMH · UNIVERSITY OF IOWA · PI ANDREASEN, NANCY C · 1994 to 2001
$2.1M
NIMH NIH HHS R01 MH040856
6 · The paper itself

Abstract

Previous studies suggest that patients with schizophrenia exhibit dysfunctions in a widely distributed circuit-the cortico-cerebellar-thalamic-cortical circuit, or CCTCC-and that this may explain the multiple cognitive deficits observed in the disorder. This study uses positron emission tomography (PET) with O(15) H₂O to measure regional cerebral blood flow (rCBF) in response to a classic test of cerebellar function, the associative learning that occurs during eyeblink conditioning, in a sample of 20 unmedicated schizophrenia patients and 20 closely matched healthy controls. The PET paradigm examined three phases of acquisition and extinction (early, middle and late). The patients displayed impaired behavioral performance during both acquisition and extinction. The imaging data indicate that, compared to the control subjects, the patients displayed decreases in rCBF in all three components of the CCTCC during both acquisition and extinction. Specifically, patients had less rCBF in the middle and medial frontal lobes, anterior cerebellar lobules I/V and VI, as well as the thalamus during acquisition and although similar areas were found in the frontal lobe, ipsilateral cerebellar lobule IX showed consistently less activity in patients during extinction. Thus this study provides additional support for the hypothesis that patients with schizophrenia have a cognitive dysmetria--an inability to smoothly coordinate many different types of mental activity--that affects even a very basic cognitive task that taps into associative learning.

Indexed as

AdolescentAdultBlinkingCerebellumCerebrovascular CirculationCognitionConditioning, ClassicalExtinction, PsychologicalFemaleFrontal LobeHumansMaleMiddle AgedPositron-Emission TomographySchizophreniaThalamusCerebellumCognitive dysmetriaEyeblinkPositron emissions tomography (PET)Schizophrenia

Identifiers

PMID24090512
PMCPMC3980571

What OpenQuestion holds

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LicenceTDM
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.