Aging alters the role of basolateral amygdala in intertemporal choice
| Autor: | Scott W Harden, Tyler W Ten Eyck, Caitlin A. Orsini, Alexa-Rae Wheeler, Charles J. Frazier, Jennifer L. Bizon, Todd J. Sahagian, Barry Setlow, Matthew M. Bruner, Caesar M Hernandez, Chase C Labiste |
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| Rok vydání: | 2019 |
| Předmět: |
Elementary cognitive task
Gratification 05 social sciences Optogenetics Intertemporal choice 050105 experimental psychology 03 medical and health sciences Brain region 0302 clinical medicine medicine.anatomical_structure Intertemporal Decision-Making medicine 0501 psychology and cognitive sciences Psychology Neuroscience 030217 neurology & neurosurgery Brain circuitry Basolateral amygdala |
| Popis: | Aging is associated with an increased ability to delay gratification. Moreover, even when matched for performance, young and aged subjects recruit distinct brain circuitry to complete complex cognitive tasks. Experiments herein used an optogenetic approach to test whether altered recruitment of the basolateral amygdala (BLA), a brain region implicated in valuation of reward-cost contingencies, contributes to age-dependent changes in intertemporal decision making. BLA inactivation while rats deliberated prior to choices between options that yielded either small, immediate or large, delayed rewards rendered both young and aged rats less impulsive. In contrast, BLA inactivation after choices were made (during evaluation of choice outcomes) rendered young rats more impulsive but had no effect in aged rats. These data define multiple, temporally-discrete roles for BLA circuits in intertemporal decision making and implicate altered recruitment of BLA in the elevated preference for delayed rewards that is characteristic of advanced age.Impact StatementBasolateral amygdala (BLA) performs multiple, temporally-discrete functions during intertemporal decision making. Differential engagement of BLA contributes to the enhanced ability to delay gratification that is characteristic of advanced ages. |
| Databáze: | OpenAIRE |
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