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Related Experiment Video

Updated: May 31, 2026

Dynamic Inter-subject Functional Connectivity Reveals Moment-to-Moment Brain Network Configurations Driven by Continuous or Communication Paradigms
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Model-based dynamical analysis of functional disconnection in schizophrenia.

Mihály Bányai1, Vaibhav A Diwadkar, Péter Erdi

  • 1KFKI Research Institute for Particle and Nuclear Physics of the Hungarian Academy of Sciences, Budapest, Hungary.

Neuroimage
|July 6, 2011
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Summary

Schizophrenia patients show impaired cognitive control of learning due to altered brain network connectivity. Specifically, reduced fronto-hippocampal and hippocampo-inferior temporal coupling impacts learning performance.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Psychiatry

Background:

  • Schizophrenia is linked to disruptions in brain functional macro-networks.
  • Impaired cognitive control is a potential deficit in schizophrenia patients.
  • Associative learning is crucial for cognitive function.

Purpose of the Study:

  • To investigate impairments in cognitive control of learning in schizophrenia patients.
  • To analyze differences in brain network architecture and effective connectivity during associative learning.
  • To correlate neural coupling abnormalities with learning deficits in schizophrenia.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) data collected during an object-location associative learning task.
  • Dynamic Causal Modeling (DCM) applied to analyze fMRI data and evaluate causal connections between brain regions.
  • Bayesian model selection used to compare model architectures and test hypotheses on effective connectivity differences between patients and controls.

Main Results:

  • Significant differences in brain model architecture were found between schizophrenia patients and controls.
  • Models lacking cognitive control connections were more probable in patients.
  • Reduced fronto-hippocampal and hippocampo-inferior temporal coupling, with diminished excitatory modulation by learning, observed in patients.

Conclusions:

  • Schizophrenia is associated with fundamental alterations in brain network architecture affecting cognitive control of learning.
  • Reduced neural coupling in fronto-hippocampal and hippocampo-inferior temporal pathways may underlie learning deficits in schizophrenia.
  • These findings provide insights into the neurobiological mechanisms of cognitive impairment in schizophrenia.