Cortical plasticity elicited by acoustically cued monetary losses: an ERP study

Area of Science:

• Neuroscience
• Cognitive Psychology
• Decision Science

Background:

• Experience shapes neural processing, a phenomenon known as brain plasticity.
• The Monetary Incentive Delay (MID) task is widely used to study how incentives influence behavior and neural activity.
• Previous research highlights cortical plasticity but lacks understanding of how incentive tasks specifically alter auditory cue processing.

Purpose of the Study:

• To investigate if the MID task induces neural changes in processing auditory incentive cues.
• To determine if learning monetary outcomes modulates the brain's response to auditory cues predicting losses.
• To explore the relationship between task-induced plasticity and learning-related neural activity.

Main Methods:

• A novel auditory version of the MID task was employed, using acoustic cues for monetary losses.
• Mismatch-related negativity (MMN), an index of cortical plasticity, was measured during passive oddball tasks.
• MMN was recorded before and after participants completed two sessions of the MID task.

Main Results:

• Two MID task sessions significantly enhanced MMN for auditory cues predicting substantial monetary losses.
• This enhancement was particularly notable when discriminating monetary cues was crucial for maximizing outcomes.
• The observed brain plasticity correlated with neural activity associated with learning during the MID task.

Conclusions:

• The processing of auditory cues signaling monetary losses is dynamically altered by learned outcomes.
• The MID task effectively induces experience-dependent plasticity in auditory cortical processing.
• Learned monetary associations play a critical role in modulating neural responses to incentive-related auditory stimuli.