Surprise and error: common neuronal architecture for the processing of errors and novelty

Area of Science:

• Neuroscience
• Cognitive Neuroscience
• Brain Imaging

Background:

• Recent theories suggest a shared neuroanatomical substrate for processing errors and novel events.
• Empirical evidence in humans for this common processing network is limited.

Purpose of the Study:

• To investigate the neural basis of shared processing for errors and novel events.
• To compare neural responses to errors and novel events using human neuroimaging.

Main Methods:

• A hybrid error-monitoring/novelty-oddball task was employed.
• Scalp electroencephalography (EEG) and event-related functional magnetic resonance imaging (fMRI) were utilized.
• Independent component analysis and conjunction analysis were performed on neural data.

Main Results:

• A common neural generator for the error-related negativity (ERN) and novelty-related N2 was identified using EEG.
• fMRI revealed overlapping activation in the posterior medial frontal cortex, including the anterior midcingulate cortex (aMCC), for both errors and novel events.
• These findings provide direct evidence for a common neural system for error and novelty processing.

Conclusions:

• The study demonstrates a shared neural system for processing errors and novel events.
• Findings challenge existing theories, particularly reinforcement learning theory, regarding the function of the ERN and aMCC.
• The anterior midcingulate cortex (aMCC) appears to evaluate the need for behavioral adaptation when actions violate expectations.