Cited by 216Memory and Neural MechanismsNeuroscience and Neuropharmacology ResearchNeurotransmitter Receptor Influence on Behavior

Rapid strengthening of thalamo-amygdala synapses mediates cue–reward learning

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Tye, Kay M., Stuber, Garret D., de Ridder, Bram, Bonci, Antonello, Janak, Patricia H.·2008·Nature

Abstract

What neural changes underlie individual differences in goal-directed learning? The lateral amygdala (LA) is important for assigning emotional and motivational significance to discrete environmental cues, including those that signal rewarding events. Recognizing that a cue predicts a reward enhances an animal's ability to acquire that reward; however, the cellular and synaptic mechanisms that underlie cue-reward learning are unclear. Here we show that marked changes in both cue-induced neuronal firing and input-specific synaptic strength occur with the successful acquisition of a cue-reward association within a single training session. We performed both in vivo and ex vivo electrophysiological recordings in the LA of rats trained to self-administer sucrose. We observed that reward-learning success increased in proportion to the number of amygdala neurons that responded phasically to a reward-predictive cue. Furthermore, cue-reward learning induced an AMPA (alpha-amino-3-hydroxy-5-methyl-isoxazole propionic acid)-receptor-mediated increase in the strength of thalamic, but not cortical, synapses in the LA that was apparent immediately after the first training session. The level of learning attained by individual subjects was highly correlated with the degree of synaptic strength enhancement. Importantly, intra-LA NMDA (N-methyl-d-aspartate)-receptor blockade impaired reward-learning performance and attenuated the associated increase in synaptic strength. These findings provide evidence of a connection between LA synaptic plasticity and cue-reward learning, potentially representing a key mechanism underlying goal-directed behaviour.

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  1. [12]Doron NN, Ledoux JE. Organization of projections to the lateral amygdala from auditory and visual areas of the thalamus in the rat. J. Comp. Neurol. 1999;412:383–409. [PubMed] [Google Scholar]

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Authors
Tye, K. M., Stuber, G. D., de Ridder, B., Bonci, A., & Janak, P. H.
Affiliations
University of California, San Francisco (US)
Corresponding author
Janak, Patricia H.
Venue
Nature
Published
2008-05-11
Volume
453
Issue
7199
Pages
1253-1257
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W2011521010
Cited by
216
References
31
Citations by year
2026: 5 · 2025: 11 · 2024: 6 · 2023: 3 · 2022: 14 · 2021: 16 · 2020: 12 · 2019: 16 · 2018: 14 · 2017: 16 · 2016: 13 · 2015: 14 · 2014: 14 · 2013: 8 · 2012: 16
FWCI
6.55
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • National Institute on Drug Abuse (R01DA015096, R01DA115096)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DP2DK102256)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
lateral amygdala, synaptic plasticity, AMPA receptors, NMDA receptor blockade, individual differences in learning, sucrose self-administration, reward prediction, goal-directed learning, rats, drug addiction, eating disorders, emotional learning, NMDA receptor
MeSH terms
Amygdala, Animals, Cues, Learning, Male, Models, Neurological, Reward, Synapses, Thalamus, Receptors, N-Methyl-D-Aspartate, N-Methylaspartate, Rats, Sprague-Dawley, Receptors, AMPA, Excitatory Postsynaptic Potentials, Rats

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