ArticleJournal of psychiatry & neuroscience : JPN2019
Reduced parietofrontal effective connectivity during a working-memory task in people with high delusional ideation
Article in Journal of psychiatry & neuroscience : JPN, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
What it found
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Who cites it
7 citing papers in PubMed, 11 citations in OpenAlex.
- A working model of neural activity and phenomenal experience in psychosis.Molecular psychiatry · 2024Review
- Review
- Consistent activation differences versus differences in consistent activation: Evaluating meta-analytic contrasts.Imaging neuroscience (Cambridge, Mass.) · 2024Article
- Belief Updating in Subclinical and Clinical Delusions.Schizophrenia bulletin open · 2023Article
- Parietal-Prefrontal Feedforward Connectivity in Association With Schizophrenia Genetic Risk and Delusions.The American journal of psychiatry · 2020Article
- [Computational psychiatry : Data-driven vs. mechanistic approaches].Der Nervenarzt · 2019Review
- Brain function differences in drug-naïve first-episode auditory verbal hallucination-schizophrenia patients with versus without insight.Chinese medical journal · 2019Article
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Authors and funding
7 authors at 5 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Background: Working-memory impairment is a core cognitive dysfunction in people with schizophrenia and people at mental high risk. Recent imaging studies on working memory have suggested that abnormalities in prefrontal activation and in connectivity between the frontal and parietal regions could be neural underpinnings of the different stages of psychosis. However, it remains to be explored whether comparable alterations are present in people with subclinical levels of psychosis, as experienced by a small proportion of the general population who neither seek help nor show constraints in daily functioning. Methods: We compared 24 people with subclinical high delusional ideation and 24 people with low delusional ideation. Both groups performed an n-back working-memory task during functional magnetic resonance imaging. We characterized frontoparietal effective connectivity using dynamic causal modelling. Results: Compared to people who had low delusional ideation, people with high delusional ideation showed a significant increase in dorsolateral prefrontal activation during the working-memory task, as well as reduced working-memory-dependent parietofrontal effective connectivity in the left hemisphere. Group differences were not evident at the behavioural level. Limitations: The current experimental design did not distinguish among the working-memory subprocesses; it remains unexplored whether differences in connectivity exist at that level. Conclusion: These findings suggest that alterations in the working-memory network are also present in a nonclinical population with psychotic experiences who do not display cognitive deficits. They also suggest that alterations in working-memory-dependent connectivity show a putative continuity along the spectrum of psychotic symptoms.
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Registered trials
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 Socratic graph.