A Novel Neural Prediction Error Found in Anterior Cingulate Cortex Ensembles.

Area of Science:

• Neuroscience
• Cognitive Neuroscience

Background:

• The anterior cingulate cortex (ACC) function is debated, but theories link it to behavioral adaptation.
• The feedback-related negativity (FN), an event-related potential, is observed in the ACC when expectations are violated.

Purpose of the Study:

• To investigate the role of ACC neurons in signaling prediction errors.
• To determine if ACC neuronal activity underlies the feedback-related negativity (FN).

Main Methods:

• Electrophysiological recordings from the ACC in rats performing a task known to evoke FN in humans.
• Analysis of neuronal ensemble activity and local field potentials.

Main Results:

• A subset of ACC neurons encoded expected outcomes as abstract representations.
• Outcome representation depended on preceding trial history.
• A prediction error signal was observed as neuronal ensembles shifted from expected to actual outcomes, concurrent with FN generation.

Conclusions:

• ACC neurons signal prediction errors through dynamic changes in outcome representations.
• This neuronal signaling mechanism is associated with the generation of the feedback-related negativity (FN).
• Findings provide a novel understanding of ACC function in behavioral adaptation.