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Related Experiment Videos

Action-monitoring dysfunction in obsessive-compulsive disorder.

W J Gehring1, J Himle, L G Nisenson

  • 1Department of Psychology, University of Michigan, 525 East University Ave., Ann Arbor, MI 48109-1109, USA. wgehring@umich.edu

Psychological Science
|March 7, 2001
PubMed
Summary

Individuals with obsessive-compulsive disorder (OCD) show heightened brain activity related to error monitoring. This enhanced error-related negativity (ERN) in OCD patients correlates with symptom severity, suggesting a role in the disorder.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Psychiatry

Background:

  • Obsessive-compulsive disorder (OCD) is linked to hyperactivity in the frontal-striatal-thalamic-frontal circuit.
  • The precise function of this circuit's exaggerated activity in OCD remains debated.

Purpose of the Study:

  • To investigate the functional role of hyperactive frontal-striatal-thalamic-frontal circuits in OCD.
  • To explore whether enhanced neural activity in OCD patients reflects aberrant event monitoring and error signaling.

Main Methods:

  • Electrophysiological recordings using a speeded reaction time task.
  • Comparison of event-related brain potentials between 9 individuals with OCD and 9 matched controls.
  • Dipole modeling to localize the neural source of observed brain activity.

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Main Results:

  • Individuals with OCD exhibited an enhanced error-related negativity (ERN), a marker of action monitoring.
  • The degree of ERN enhancement in OCD patients positively correlated with their symptom severity.
  • Source localization indicated that the enhanced ERN originated in medial frontal regions, potentially the anterior cingulate cortex.

Conclusions:

  • The findings suggest that a hyperactive frontal-striatal-thalamic-frontal circuit in OCD may involve an oversensitive error-monitoring system.
  • This enhanced error signaling could contribute to the persistent, intrusive thoughts and compulsive behaviors characteristic of OCD.
  • The anterior cingulate cortex is implicated as a potential neural substrate for this aberrant monitoring process in OCD.