Motivated cognitive control: reward incentives modulate preparatory neural activity during task-switching
1Department of Psychology, Washington University, St. Louis, Missouri 63139, USA. acsavine@artsci.wustl.edu
Summary
Monetary rewards improve task-switching performance by reducing costs. This occurs through enhanced neural activity in cognitive control regions, particularly the dorsolateral prefrontal cortex (DLPFC), aiding task preparation.
Area of Science:
- Cognitive Neuroscience
- Neuroeconomics
- Psychology
Background:
- Executive control is influenced by both cognitive and motivational factors.
- Understanding the neural basis of how incentives impact cognitive control is crucial.
Purpose of the Study:
- To investigate the neural dynamics of task-switching performance under performance-contingent reward incentives.
- To examine how monetary bonuses modulate brain activity in cognitive control and reward networks.
Main Methods:
- Utilized functional magnetic resonance imaging (fMRI) during a cued task-switching paradigm.
- Behavioral data analyzed for performance improvements and task-switch cost reductions.
- Neural activity correlated with trial-by-trial incentive value and task-switching demands.
Main Results:
- Incentive trials showed improved performance and reduced task-switch costs.
- Reward-related brain regions (dopaminergic midbrain, paracingulate cortex) showed increased activation.
- Lateral prefrontal cortex, including dorsolateral prefrontal cortex (DLPFC), exhibited incentive-modulated activation patterns.
- Left DLPFC activation increases predicted subsequent reward due to optimal performance.
Conclusions:
- Motivational incentives selectively impact brain regions supporting cognitive control during task-switching.
- Incentives may enhance cognitive control by improving task preparation, particularly in left DLPFC.
- Reward mechanisms play a significant role in modulating executive functions.
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