Error-related brain activity in obsessive-compulsive undergraduates.

Area of Science:

• Neuroscience
• Cognitive Psychology
• Psychiatry

Background:

• Error-related negativity (ERN) is an event-related brain potential (ERP) reflecting action monitoring and error detection.
• ERN is associated with anterior cingulate cortex (ACC) activity and typically occurs 50–150 ms post-response.
• Previous research indicated an enhanced ERN in patients with obsessive-compulsive disorder (OCD).

Purpose of the Study:

• To investigate if college students with high obsessive-compulsive (OC) characteristics exhibit an enhanced ERN compared to those with low OC characteristics.
• To explore the relationship between OC traits and the neural mechanisms of error monitoring.

Main Methods:

• Utilized a modified Stroop task emphasizing both speed and accuracy.
• Measured response-locked electroencephalography (EEG) to record ERPs, specifically the ERN.
• Compared ERN amplitudes between a high-OC group (n=18) and a low-OC group (n=17) using the Obsessive-Compulsive Inventory (OCI).

Main Results:

• A significantly larger frontally maximal negativity, indicative of ERN, was observed in high-OCI subjects compared to low-OCI subjects.
• No significant differences in task performance (accuracy or speed) were found between the high-OC and low-OC groups.
• The findings suggest that enhanced error monitoring is present even in non-clinical populations with OC characteristics.

Conclusions:

• The results support the hypothesis that characteristics associated with OCD are linked to hyper-functioning error and action-monitoring processes.
• An enhanced ERN in individuals with high OC traits may represent a neural correlate of increased sensitivity to errors.
• These findings contribute to understanding the neurobiological underpinnings of obsessive-compulsive disorder spectrum conditions.