Dissertation/Thesis Abstract

Intrinsic Reward Motivates Large-Scale Shifts Between Cognitive Control and Default Mode Networks During Task Performance
by Huskey, Richard W., Ph.D., University of California, Santa Barbara, 2016, 67; 10159767
Abstract (Summary)

Cognitive control is an important framework for understanding the neuropsychological processes that underlie and enable the successful completion of everyday tasks. Only recently has research in this area investigated motivational contributions to control allocation. An important gap in our understanding is the way in which intrinsic rewards associated with a task motivate the sustained allocation of cognitive control. In three behavioral and one functional magnetic resonance imaging studies, we use a naturalistic and open-sourced simulator to show that changes in the balance between task difficulty and an individual’s ability to perform the task result in different levels of intrinsic reward, which motivates dynamic shifts between networked brain states. Specifically, high levels of intrinsic reward associated with a balance between task difficulty and individual ability are associated with increased connectivity between cognitive control and reward networks. By comparison, a mismatch between task difficulty and individual ability is associated with lower levels of intrinsic reward and corresponds to increased activity within the default mode network. Insular activation suggests that motivational salience, as defined by the level of intrinsic reward, drives shifts between networked brain states associated with task engagement or disengagement. These results implicate reward processing as a critical component of cognitive control.

Indexing (document details)
Advisor: Weber, Rene
Commitee: Linz, Daniel, Miller, Michael
School: University of California, Santa Barbara
Department: Communication
School Location: United States -- California
Source: DAI-A 78/02(E), Dissertation Abstracts International
Subjects: Neurosciences, Communication, Cognitive psychology
Keywords: Attention, Cognitive control, Flow, Fmri, Motivation, Reward
Publication Number: 10159767
ISBN: 978-1-369-14695-0
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