Cited by 555Memory and Neural MechanismsNeural and Behavioral Psychology StudiesNeurotransmitter Receptor Influence on Behavior

Neurotoxic lesions of basolateral, but not central, amygdala interfere with Pavlovian second-order conditioning and reinforcer devaluation effects

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Hatfield, Tammy, Han, Jung-Soo, Conley, Michael, Gallagher, Michela, Holland, Peter·1996·The Journal of Neuroscience

Abstract

Considerable evidence suggests that various discrete nuclei within the amygdala complex are critically involved in the assignment of emotional significance or value to events through associative learning. Much of this evidence comes from aversive conditioning procedures. For example, lesions of either basolateral amygdala (ABL) or the central nucleus (CN) interfere with the acquisition or expression of conditioned fear. The present study examined the effects of selective neurotoxic lesions of either ABL or CN on the acquisition of positive incentive value by a conditioned stimulus (CS) with two appetitive Pavlovian conditioning procedures. In second-order conditioning experiments, rats first received light–food pairings intended to endow the light with reinforcing power. The acquired reinforcing power of the light was then measured by examining its ability to serve as a reinforcer for second-order conditioning of a tone when tone–light pairings were given in the absence of food. Acquisition of second-order conditioning was impaired in rats with ABL lesions but not in rats with CN lesions. In reinforcer devaluation procedures, conditioned responding of rats with ABL lesions was insensitive to postconditioning changes in the value of the reinforcer, whereas rats with CN lesions, like normal rats, were able to spontaneously adjust their CRs to the current value of the reinforcer. The results of both test procedures indicate that ABL, but not CN, is part of a system involved in CSs’ acquisition of positive incentive value. Together with evidence that identifies a role for CN in certain changes in attentional processing of CSs in conditioning, these results suggest that separate amygdala subsystems contribute to a variety of processes inherent in associative learning.

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Research works printed but not linked: 3

  1. Everitt BJ, Robbins TW (1992) Amygdala-ventral striatal interactions and reward-related processes. In: The amygdala: neurobiological as- pects of emotion, memory, and mental dysfunction (Aggleton J, ed), pp 401-429. New York: Wiley.
  2. Gallagher M, Holland PC (1992) Understanding the function of the central nucleus: is simple conditioning enough? In: The amygdala (Aggleton J, ed), pp 307-321. New York: Wiley.
  3. LeDoux JE (1992) Emotion and the amygdala. In: The amygdala: neu- robiological aspects of emotion, memory, and mental dysfunction (Aggleton J, ed). New York: Wiley.

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Authors
Hatfield, T., Han, J.-S., Conley, M., Gallagher, M., & Holland, P.
Affiliations
  • University of North Carolina at Chapel Hill (US)
  • Duke University (US)
Venue
The Journal of Neuroscience
Published
1996-08-15
Volume
16
Issue
16
Pages
5256-5265
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W1903066154
Cited by
555
References
31
Citations by year
2026: 3 · 2025: 4 · 2024: 8 · 2023: 9 · 2022: 13 · 2021: 15 · 2020: 4 · 2019: 17 · 2018: 12 · 2017: 13 · 2016: 11 · 2015: 23 · 2014: 13 · 2013: 27 · 2012: 19
FWCI
9.30
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
  • UNC Libraries
Funders
  • National Institutes of Health (1k05mh001149-01a1)
  • National Institute of Mental Health (R01MH053667, MH53667, K05MH01149)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural and Behavioral Psychology Studies
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
basolateral amygdala, central amygdala, reinforcer devaluation, incentive value, appetitive conditioning, conditioned stimulus, neurotoxic lesion, associative learning, fear conditioning, attentional processes
MeSH terms
Acoustic Stimulation, Amygdala, Animals, Avoidance Learning, Behavior, Animal, Conditioning, Classical, Eating, Male, Neurotoxins, Photic Stimulation, Rats, Inbred Strains, Reinforcement, Psychology, Rats

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