Prediction-error signals in anterior cingulate cortex drive task-switching

Area of Science:

• Neuroscience
• Cognitive Science
• Computational Neuroscience

Background:

• Task-switching is a key cognitive function enabling adaptation to changing rules.
• Detecting prediction-errors is vital for updating knowledge and behavioral flexibility.
• The neural basis of rapid task-switching and prediction-error computation remains largely unknown.

Purpose of the Study:

• To investigate the neural mechanisms underlying rapid, single-trial task-switching.
• To determine the role of cognitive prediction-errors in task-switching behavior.
• To identify the specific brain circuits involved in prediction-error computation.

Main Methods:

• Mice were trained to use prediction-errors for task-switching between two rules.
• Optogenetics was used to manipulate anterior cingulate cortex (ACC) activity.
• Widefield and two-photon calcium imaging assessed neural activity.
• An all-optical approach investigated interneuron circuit function.

Main Results:

• The ACC was essential for rapid task-switching, contingent on neural prediction-error signals.
• Prediction-error signals were projection-target dependent and correlated with successful switching.
• A specific disinhibitory interneuron circuit was identified as critical for prediction-error computation.

Conclusions:

• The anterior cingulate cortex (ACC) plays a critical role in rapid task-switching through prediction-error signaling.
• A novel disinhibitory interneuron circuit mechanism underlies prediction-error computation.
• These findings elucidate a neural circuit for transitioning between cognitive states.