Perseveration in the presence of punishment : the effects of chronic cocaine exposure and lesions to the prefrontal cortex
Copyright © 2013 Elsevier B.V. All rights reserved..
Perseveration is the repetition of a previously appropriate response in a manner, or context, which is detrimental to the individual. Although both cocaine exposure and prefrontal cortex (PFC) dysfunctions have been implicated in perseverative-like behaviours, the underlying nature of the impairments has been debated. The current study tested whether chronic cocaine exposure and PFC lesions induce perseverative-like behaviours by causing insensitivity to punishment. Food-restricted male Sprague-Dawley rats were trained to respond for sucrose on concurrent schedules of reinforcement. After initial training, rats received either a sensitizing regimen of cocaine exposure, or excitotoxic lesions to subregions of the PFC. The test of perseveration involved a choice of responding between two levers associated with fixed ratio and progressive ratio (PR) schedules. Responding on the PR lever was punished by a 1 min timeout period. It was found that, unlike control subjects, those exposed to chronic cocaine, or with lesions to the medial prefrontal cortex, were significantly slower in adapting their responding to avoid punishment. The current study provides evidence that both cocaine exposure and lesions to the prefrontal cortex can increase perseverative-like responding, although the magnitude and permanence of these effects are contingent on the nature of the task.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2014 |
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| Erschienen: |
2014 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:261 |
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| Enthalten in: |
Behavioural brain research - 261(2014) vom: 15. März, Seite 185-92 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Allen, Craig P [VerfasserIn] |
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| Links: |
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| Themen: |
Cocaine |
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| Anmerkungen: |
Date Completed 06.10.2014 Date Revised 10.12.2019 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1016/j.bbr.2013.12.025 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM234066261 |
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| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Copyright © 2013 Elsevier B.V. All rights reserved. | ||
| 520 | |a Perseveration is the repetition of a previously appropriate response in a manner, or context, which is detrimental to the individual. Although both cocaine exposure and prefrontal cortex (PFC) dysfunctions have been implicated in perseverative-like behaviours, the underlying nature of the impairments has been debated. The current study tested whether chronic cocaine exposure and PFC lesions induce perseverative-like behaviours by causing insensitivity to punishment. Food-restricted male Sprague-Dawley rats were trained to respond for sucrose on concurrent schedules of reinforcement. After initial training, rats received either a sensitizing regimen of cocaine exposure, or excitotoxic lesions to subregions of the PFC. The test of perseveration involved a choice of responding between two levers associated with fixed ratio and progressive ratio (PR) schedules. Responding on the PR lever was punished by a 1 min timeout period. It was found that, unlike control subjects, those exposed to chronic cocaine, or with lesions to the medial prefrontal cortex, were significantly slower in adapting their responding to avoid punishment. The current study provides evidence that both cocaine exposure and lesions to the prefrontal cortex can increase perseverative-like responding, although the magnitude and permanence of these effects are contingent on the nature of the task | ||
| 650 | 4 | |a Journal Article | |
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| 650 | 4 | |a Cocaine | |
| 650 | 4 | |a Perseveration | |
| 650 | 4 | |a Prefrontal cortex | |
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| 650 | 4 | |a Reversal learning | |
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