Journal Article

Aberrant Dependence of Default Mode/Central Executive Network Interactions on Anterior Insular Salience Network Activity in Schizophrenia

Andrei Manoliu, Valentin Riedl, Andriy Zherdin, Mark Mühlau, Dirk Schwerthöffer, Martin Scherr, Henning Peters, Claus Zimmer, Hans Förstl, Josef Bäuml, Afra M. Wohlschläger and Christian Sorg

in Schizophrenia Bulletin

Published on behalf of Maryland Psychiatric Research Center

Volume 40, issue 2, pages 428-437
Published in print March 2014 | ISSN: 0586-7614
Published online March 2013 | e-ISSN: 1745-1701 | DOI: http://dx.doi.org/10.1093/schbul/sbt037
Aberrant Dependence of Default Mode/Central Executive Network Interactions on Anterior Insular Salience Network Activity in Schizophrenia

More Like This

Show all results sharing this subject:

  • Child and Adolescent Psychiatry

GO

Show Summary Details

Preview

In schizophrenia, consistent structural and functional changes have been demonstrated for the insula including aberrant salience processing, which is critical for psychosis. Interactions within and across default mode and central executive network (DMN, CEN) are impaired in schizophrenia. The question arises whether these 2 types of changes are related. Recently, the anterior insula has been demonstrated to control DMN/CEN interactions. We hypothesized that aberrant insula and DMN/CEN activity in schizophrenia is associated with an impaired dependence of DMN/CEN interactions on anterior insular salience network (SN) activity. Eighteen patients with schizophrenia during psychosis and 20 healthy controls were studied by resting-state-fMRI and psychometric examination. High-model-order independent component analysis of fMRI data revealed spatiotemporal patterns of synchronized ongoing blood-oxygenation-level-dependent (BOLD) activity including SN, DMN, and CEN. Scores of functional and time-lagged connectivity across networks’ time courses were calculated. Connectivity scores and spatial network maps were compared between groups and related with patients’ hallucination and delusion severity. Spatial BOLD-synchronicity was altered in patients’ SN, DMN, and CEN, including decreased activity in the right anterior insula (rAI). Patients’ functional connectivity between DMN and CEN was increased and related with hallucinations severity. Importantly, patients’ time-lagged connectivity between SN and DMN/CEN was reduced, and decreased rAI activity of the SN was associated with both hallucinations and increased functional connectivity between DMN and CEN. Data provide evidence for an aberrant dependence of DMN/CEN interactions on anterior insular SN activity, linking impaired insula, DMN, CEN activity, and psychosis in schizophrenia.

Keywords: schizophrenia; psychosis; anterior insula; salience network; default mode network; central executive network

Journal Article.  4705 words.  Illustrated.

Subjects: Child and Adolescent Psychiatry

Full text: subscription required

How to subscribe Recommend to my Librarian

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.