Fronto-cingulate effective connectivity in obsessive compulsive disorder: a study with fMRI and dynamic causal...

Area of Science:

• Neuroscience
• Psychiatry
• Cognitive Psychology

Background:

• Obsessive compulsive disorder (OCD) is linked to an overactive error control system.
• The fronto-cingulate system plays a crucial role in error detection and control.
• The precise functional interactions within this network in OCD remain unclear.

Purpose of the Study:

• To investigate the functional interplay within the fronto-cingulate network during error control in OCD.
• To examine brain activation and effective connectivity during a decision-making task in OCD patients and healthy controls.

Main Methods:

• Utilized functional magnetic resonance imaging (fMRI) with a Stroop color-word task.
• Employed univariate data analysis and dynamic causal modeling (DCM) for effective connectivity analysis.
• Compared 21 patients with OCD against 21 matched healthy controls.

Main Results:

• OCD patients exhibited enhanced activation in the fronto-cingulate system during incongruent conditions.
• A significantly stronger modulation of effective connectivity from the dorsal anterior cingulate cortex (ACC) to the left dorsolateral prefrontal cortex (DLPFC) was observed in OCD patients.
• These findings indicate heightened activity in the error control network.

Conclusions:

• The results support the hypothesis of an overactive error control system in OCD.
• This overactivity may contribute to the suppression of prepotent responses during decision-making in individuals with OCD.
• The study highlights the importance of fronto-cingulate network connectivity in understanding OCD pathophysiology.