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ERIC Number: EJ943515
Record Type: Journal
Publication Date: 2011
Pages: 14
Abstractor: As Provided
Reference Count: 36
ISBN: N/A
ISSN: ISSN-0033-2933
Pavlovian Extinction of the Discriminative Stimulus Effects of Nicotine and Ethanol in Rats Varies as a Function of Context
Troisi, Joseph R., II
Psychological Record, v61 n2 p199-212 Spr 2011
Operant extinction contingencies can undermine the discriminative stimulus effects of drugs. Here, nicotine (0.4 mg/kg) and ethanol (0.8 g/kg) first functioned as either an S[superscript D] or S[superscript Delta], in a counterbalanced one-lever go/no-go (across sessions) operant drug discrimination procedure. Pavlovian extinction in the training context (levers removed) grossly undermined the response rates and discriminative stimulus functions of nicotine, but not ethanol; presentation of the drugs in the home cage had no impact on stimulus control for either drug but lowered overall response rates. This result was replicated between, and within, groups of rats that differed in the order of extinction phases. These data suggest that stimulus-reinforcer relationships play a role in the discriminative stimulus effects of drugs with regard to response rate, but vary pharmacologically and as a function of the context in which extinction occurs. (Contains 2 figures.)
Southern Illinois University Carbondale. Mailcode 4609, Rehabilitation Institute, Carbondale, IL 62901-4609. Tel: 618-536-7704; e-mail: psychrec@siu.edu; Web site: http://www.siuc.edu/~ThePsychologicalRecord/index.html
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A