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Beyond dopamine: the noradrenergic system and mental effort
Nicholas J Malecek1, Russell A Poldrack
1Imaging Research Center, University of Texas at Austin, Austin, TX 78712. malecek@utexas.edu poldrack@utexas.edu www.poldracklab.org.
The Behavioral and Brain Sciences
|December 6, 2013
Summary
Understanding the neural basis of effort requires integrating valuation and self-control. Brainstem signals interacting with these systems influence persistence when facing challenges, informing a normative neural model of effort.
Area of Science:
- Neuroscience
- Cognitive Science
- Decision Making
Background:
- Effort-based decision-making is crucial for goal pursuit.
- Flexible integration of valuation and self-control is necessary for effortful behavior.
- Brainstem neuromodulatory systems play a role in regulating effort.
Purpose of the Study:
- To propose an opportunity cost model of effort.
- To elucidate the neural mechanisms underlying effort-based decision-making.
- To integrate valuation and self-control systems within a neural framework.
Main Methods:
- Theoretical modeling of effort-based decision-making.
- Review of neurobiological evidence for valuation and self-control networks.
- Analysis of reciprocal connections with brainstem neuromodulatory systems.
Main Results:
- An opportunity cost model necessitates flexible integration of valuation and self-control.
- Reciprocal connections between neural networks and brainstem systems signal effort persistence.
- These interactions influence subsequent persistence or failure in effort tasks.
Conclusions:
- A comprehensive neural model of effort must account for the interaction between valuation, self-control, and neuromodulatory systems.
- Understanding these interactions is key to predicting and potentially modulating effort-based behaviors.
- This framework advances a normative neural model of effort.
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