کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9406904 | 1290143 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of metabotropic glutamate receptor 5 on latent inhibition in conditioned taste aversion
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب رفتاری
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
Latent inhibition (LI) is a phenomenon by which pre-exposure of a conditioned stimulus (CS) prior to the CS-unconditioned stimulus (US) pairings retards conditioned responding (CR). LI has been demonstrated in a variety of learning tasks including conditioned taste aversion (CTA). Earlier work has shown that systemic administration of 2-methyl-6-(phenylethynyl)-pyridine (MPEP), a selective metabotropic glutamate receptor 5 (mGlu5) antagonist, is able to disrupt classical conditioning in CTA. The present study investigated the involvement of mGlu5 receptors in LI using a CTA procedure. In the first experiment, rats received either water (non-pre-exposed, NPE) or a saccharin solution (pre-exposed, PE) on 2 consecutive days. The animals then received conditioning in which a fixed amount of saccharin was paired with lithium chloride and then the CR to the taste was tested. Either MPEP (3, 6, 12Â mg/kg) or vehicle was injected intraperitoneally prior to taste pre-exposure or testing. Animals in the vehicle control groups displayed LI. MPEP injections before pre-exposure trials attenuated LI but also reduced consumption during pre-exposure, which obscured interpretation of the LI effect. The second experiment used four pre-exposure trials and controlled access to fixed amount of the solutions during the pre-exposure as well as the conditioning trials. Rats were injected before pre-exposure trials but not before the test trial. The results found that MPEP attenuates latent inhibition suggesting that the mGlu5 receptor exerts an influence on the processes that underlie the effects of taste pre-exposure on conditioning.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Behavioural Brain Research - Volume 157, Issue 1, 10 February 2005, Pages 71-78
Journal: Behavioural Brain Research - Volume 157, Issue 1, 10 February 2005, Pages 71-78
نویسندگان
Carla Bills, Todd R. Schachtman, Peter Serfozo, Will P.J.M. Spooren, Fabrizio Gasparini, Agnes Simonyi,