Human anterior cingulate cortex is activated by negative feedback: evidence from event-related potentials in a...

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Electrophysiology

Background:

• The error-related negativity (ERN) is an electrophysiological signal linked to anterior cingulate activity.
• Its precise function, whether reflecting response conflict or evaluation, remains debated.
• Understanding the ERN is crucial for comprehending error monitoring processes.

Purpose of the Study:

• To investigate whether the ERN/N(e) reflects response conflict or response evaluation.
• To differentiate the roles of conflict detection versus outcome evaluation in ERN generation.
• To elucidate the neural underpinnings of error monitoring.

Main Methods:

• Event-related potentials (ERPs) were recorded during a card guessing task.
• The task was designed to elicit negative feedback without inducing response conflict.
• Source localization using dipole analysis was performed on scalp potentials.

Main Results:

• A significant negative ERP deflection, identified as ERN/N(e), was observed following negative feedback.
• Dipole analysis localized the ERN/N(e) sources to the anterior cingulate and left inferior prefrontal cortex.
• The ERN/N(e) occurred in a context devoid of response conflict, specifically after receiving negative feedback.

Conclusions:

• The findings suggest the ERN/N(e) primarily reflects response evaluation processes.
• This electrophysiological component appears to compare expected outcomes with actual feedback.
• The ERN/N(e) is not solely driven by response conflict but also by the evaluation of outcomes.