Abstract:
:We have developed a rabbit model of in utero exposure to intravenous injections of cocaine given twice daily to dams from gestational days 8-29. At the doses employed (4 mg/kg, injected twice daily), no differences were found in the body weight gain of dams, time to delivery, litter size, and body weight or other physical characteristics of the offspring. However, cocaine-exposed pups displayed an abnormal structural and neurochemical development of the anterior cingulate cortex which persisted into adulthood. In agreement with the known functions of the anterior cingulate cortex, we found that adult, sexually mature rabbits, exposed to cocaine prenatally, demonstrate impairments in motor function, alterations in associative learning and severe impairments in discrimination learning. Moreover, the alterations in discrimination learning were interpreted to be due to deficits in attentional processes. Specifically, cocaine progeny preferentially attend to more salient stimuli even when these are not relevant to the task. Consequently they have difficulty in attending to less salient but relevant stimuli when more salient but irrelevant stimuli occur in the same context. We concluded that the learning deficits are a reflection of the morphologic and neurochemical abnormalities of the anterior cingulate cortex. Alterations in dopamine function of the caudate nucleus may also contribute to the deficits in motor performance.
journal_name
Ann N Y Acad Scijournal_title
Annals of the New York Academy of Sciencesauthors
Romano AG,Harvey JAsubject
Has Abstractpub_date
1998-06-21 00:00:00pages
89-108eissn
0077-8923issn
1749-6632journal_volume
846pub_type
杂志文章abstract::Mass changes of skeletal muscles occur in a variety of species during the migratory period. Phenotypic flexibility of flight muscle mass is considered to represent adaptations of the flight muscle to changing power requirements associated with changes in body mass. We analyzed the relationship between muscle masses an...
journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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更新日期:2010-04-01 00:00:00
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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