Evidence map›Paper›PMID 18840473›Full record

ArticleBehavioural brain research2008

Effect of quinolinic acid-induced lesions of the subthalamic nucleus on performance on a progressive-ratio schedule of reinforcement: a quantitative analysis.

G Bezzina, F S den Boon, C L Hampson, T H C Cheung, S Body, C M Bradshaw, E Szabadi, I M Anderson, J F W Deakin

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Article in Behavioural brain research, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

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3 · Its place in the literature

Who cites it

9 citing papers in PubMed, 1 synthesis or guideline pooled it.

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  2. In praise of the hyperbola.Journal of the experimental analysis of behavior · 2026
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4 · The record

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5 · Who and what money

Authors and funding

9 authors.

G BezzinaPsychopharmacology Section, Division of Psychiatry, University of Nottingham, Room B109, Medical School, Queen's Medical Centre, Nottingham NG72UH, UK.
F S den Boon
C L Hampson
T H C Cheung
S Body
C M Bradshaw
E Szabadi
I M Anderson
J F W Deakin

Funding

Wellcome Trust
6 · The paper itself

Abstract

unlabelledThe subthalamic nucleus (STN), a major relay in the indirect striatofugal pathway, plays an important role in extrapyramidal motor control. Recent evidence indicates that it may also be involved in regulating the incentive value of food reinforcers.

objectiveTo examine the effect of lesions of the STN on performance on a progressive-ratio schedule using a quantitative model that dissociates effects of interventions on motor and motivational processes [Killeen PR. Mathematical principles of reinforcement. Behav Brain Sci 1994;17:105-72]. Rats with bilateral quinolinic acid-induced lesions of the STN (n=14) or sham lesions (n=14) were trained to press a lever for food-pellet reinforcers under a progressive-ratio schedule. In Phase 1 (90 sessions) the reinforcer was one pellet; in Phase 2 (30 sessions) it was two pellets; in Phase 3 (30 sessions) it was again one pellet.

resultsThe performance of both groups conformed to the model of progressive-ratio schedule performance. The motor parameter, delta, was significantly higher in the STN-lesioned than the sham-lesioned group, reflecting lower overall response rates in the lesioned group. The motivational parameter, a, was significantly higher in the STN-lesioned group than in the sham-lesioned group, consistent with enhanced reinforcer value in the STN-lesioned group compared to the sham-lesioned group. In both groups, a was sensitive to changes in reinforcer size, being significantly greater under the two-pellet condition (Phase 2) than under the one-pellet condition (Phases 1 and 3). The results suggest that destruction of the STN impairs response capacity and enhances the incentive value of food reinforcers.

Indexed as

Reinforcement, PsychologyAnimalsBehavior, AnimalBody WeightChoice BehaviorConditioning, OperantCuesFemaleFood DeprivationMicroinjectionsPsychomotor PerformanceQuinolinic AcidRatsRats, WistarReaction TimeReinforcement ScheduleQuinolinic Acid

Identifiers

PMID18840473
PMCPMC3098367

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.