Abstract：
BACKGROUND:Flexible cognition is a set of processes mediated by the prefrontal cortex (PFC), an area of the brain that continues to develop during adolescence and into adulthood. Adult rodents exhibit impairments specific to reversal learning across various dosing regimens of methamphetamine (mAMPH). For adolescent rodents, ongoing PFC development can be assessed by discrimination reversal learning, a task dependent on frontostriatal integrity. The task may also index an increased vulnerability for mAMPH sampling in adulthood. METHODS:The purpose of the present study was to investigate the long-term effects of escalating, adolescent mAMPH exposure on reversal learning, a PFC-dependent task (Experiment 1) and the likelihood of later sampling of mAMPH in adulthood (Experiment 2). RESULTS:Unlike previous research in adult-treated rats, our results show more generalized learning impairments after adolescent mAMPH exposure to include both attenuated visual discrimination as well as reversal learning. Additionally, we found that rats pre-exposed to mAMPH during adolescence consumed significantly more drug in adulthood. Intake of mAMPH was positively correlated with this learning. Taken together, these findings show that even modest exposure to mAMPH during adolescence may induce general learning impairments in adulthood, and an enduring sensitivity to the effects of mAMPH.
journal_name
Drug Alcohol Dependjournal_title
Drug and alcohol dependenceauthors
Ye T,Pozos H,Phillips TJ,Izquierdo Adoi
10.1016/j.drugalcdep.2014.02.021subject
Has Abstractpub_date
2014-05-01 00:00:00pages
17-23eissn
0376-8716issn
1879-0046pii
S0376-8716(14)00076-3journal_volume
138pub_type
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journal_title：Drug and alcohol dependence
pub_type： 杂志文章
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