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Anterior cingulate cortex activation during cognitive interference in schizophrenia.

Stephan Heckers1, Anthony P Weiss, Thilo Deckersbach

  • 1Department of Psychiatry, Massachusetts General Hospital, Boston, 02129, USA. heckers@psych.mgh.harvard.edu

The American Journal of Psychiatry
|April 2, 2004
PubMed
Summary
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Schizophrenia patients show medial wall abnormalities in the brain's anterior cingulate cortex. Functional MRI revealed reduced activation during cognitive interference tasks, indicating potential neural differences.

Area of Science:

  • Neuroscience
  • Psychiatry

Background:

  • Previous research indicates structural and functional anomalies in the anterior cingulate cortex (ACC) in schizophrenia patients.
  • The ACC plays a crucial role in cognitive control and emotional regulation.

Purpose of the Study:

  • To investigate functional abnormalities in the dorsal anterior cingulate cortex (dACC) in patients with chronic schizophrenia.
  • To compare brain activation patterns between schizophrenia patients and healthy controls using a novel cognitive task.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was employed.
  • The Multi-Source Interference Task (MSIT) was used to elicit dACC activation.
  • 19 male patients with chronic schizophrenia and 15 healthy male controls participated.

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Main Results:

  • No significant differences in performance (reaction time, accuracy) were observed between groups.
  • Both groups showed medial wall activation in the prefrontal cortex during cognitive interference.
  • However, significantly fewer schizophrenia patients (16%) exhibited maximal activation in the dACC compared to healthy controls (67%).

Conclusions:

  • The MSIT effectively activates the medial wall of the prefrontal cortex, particularly the dACC, during cognitive interference.
  • Individual analysis of fMRI data revealed abnormalities in medial wall activation patterns in schizophrenia patients.
  • These findings suggest functional alterations in the dACC contribute to schizophrenia pathophysiology.