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Age Differences in Striatal Delay Sensitivity during Intertemporal Choice in Healthy Adults.

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Date
2011
Authors
Samanez-Larkin, Gregory R
Mata, Rui
Radu, Peter T
Ballard, Ian C
Carstensen, Laura L
McClure, Samuel M
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Abstract
Intertemporal choices are a ubiquitous class of decisions that involve selecting between outcomes available at different times in the future. We investigated the neural systems supporting intertemporal decisions in healthy younger and older adults. Using functional neuroimaging, we find that aging is associated with a shift in the brain areas that respond to delayed rewards. Although we replicate findings that brain regions associated with the mesolimbic dopamine system respond preferentially to immediate rewards, we find a separate region in the ventral striatum with very modest time dependence in older adults. Activation in this striatal region was relatively insensitive to delay in older but not younger adults. Since the dopamine system is believed to support associative learning about future rewards over time, our observed transfer of function may be due to greater experience with delayed rewards as people age. Identifying differences in the neural systems underlying these decisions may contribute to a more comprehensive model of age-related change in intertemporal choice.
Type
Journal article
Subject
aging
decision making
discounting
experience
intertemporal choice
reward
ventral striatum
Permalink
https://hdl.handle.net/10161/14580
Published Version (Please cite this version)
10.3389/fnins.2011.00126
Publication Info
Samanez-Larkin, Gregory R; Mata, Rui; Radu, Peter T; Ballard, Ian C; Carstensen, Laura L; & McClure, Samuel M (2011). Age Differences in Striatal Delay Sensitivity during Intertemporal Choice in Healthy Adults. Front Neurosci, 5. pp. 126. 10.3389/fnins.2011.00126. Retrieved from https://hdl.handle.net/10161/14580.
This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.
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Scholars@Duke

Samanez-Larkin

Gregory Russell Samanez-Larkin

Jack H. Neely Associate Professor
Research in our lab examines how motivation, emotion, and cognition influence decision making and health behavior across the life span. Our research is at the intersection of a number of subfields within psychology, neuroscience, and economics including human development, affective science, cognitive neuroscience, behavioral economics, and consumer finance. We use a combination of behavioral and neuroimaging techniques ranging from detailed measurement of functional brain activity (fMRI) and neu
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