Contextual and behavioral influences on uncertainty in obsessive-compulsive disorder

Area of Science:

• Neuroscience
• Cognitive Psychology
• Psychiatry

Background:

• Behavioral adaptation relies on integrating context, cognition, and action consequences.
• Obsessive-compulsive disorder (OCD) may stem from disrupted interactions within this reciprocal determinism model.
• Prefrontal cortex functions are crucial for decision-making and behavioral regulation.

Purpose of the Study:

• To investigate how error signals and checking behaviors influence prefrontal cortex function during decision-making in individuals with OCD.
• To assess the relationship between intolerance of uncertainty (IU) and neural activity in OCD patients and healthy controls.

Main Methods:

• A behavioral task was employed to induce IU and subsequent checking behaviors.
• Functional magnetic resonance imaging (fMRI) was used to measure brain activity during the task.
• Participants included 14 individuals with OCD and 14 matched healthy controls.

Main Results:

• IU intensity correlated with checking behaviors in both groups.
• Unlike healthy controls, OCD patients' checking behaviors were not influenced by external error signals.
• IU intensity positively correlated with orbitofrontal cortex (OFC) activation in both groups.
• Error signals modulated OFC activation related to IU, but checking behaviors did not decrease this activation in OCD patients as observed in controls.

Conclusions:

• OCD-related OFC dysfunction associated with IU is independent of contextual cues and behavioral responses.
• Alterations in the dynamic functioning of the OFC neural network may underlie the expression of OCD symptoms.
• These findings highlight the role of impaired neural network dynamics in the pathophysiology of OCD.