Limited physical contact through a mesh barrier is sufficient for social reward-conditioned place preference in adolescent male rats
| Autor: | Lauren E. Hood, Natalie A. Peartree, Nathan S. Pentkowski, Kayla N. Chandler, Kenneth J. Thiel, Federico Sanabria, Janet L. Neisewander |
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| Rok vydání: | 2012 |
| Předmět: |
Male
medicine.medical_specialty Time Factors Experimental and Cognitive Psychology Motor Activity Audiology Article Developmental psychology Rats Sprague-Dawley Behavioral Neuroscience Reward Male rats medicine Animals Enhanced sensitivity Interpersonal Relations Analysis of Variance Pair Bond Cross-Over Studies Contact behavior Wire mesh Conditioned place preference Rats Animals Newborn Conditioning Operant Conditioning Tennis ball Analysis of variance Psychology psychological phenomena and processes |
| Zdroj: | Physiology & Behavior. 105:749-756 |
| ISSN: | 0031-9384 |
| DOI: | 10.1016/j.physbeh.2011.10.001 |
| Popis: | Adolescence is a period of enhanced sensitivity to social influences and vulnerability to drug abuse. Social reward in adolescent rats has been demonstrated with the conditioned place preference (CPP) model, but it is not clear whether limited contact with another rat without play is sufficient to produce reward. We investigated this issue using an apparatus containing two main compartments each with a wire mesh barrier that allowed rats placed on either side of the barrier to have limited physical contact. Adolescent male rats were given two conditioning sessions/day for 2 or 8 days following baseline preference tests. Rats were placed into their preferred side alone for one daily 10-min session and into their initially non-preferred side (i.e., CS) for the other session during which they either had restricted or unrestricted physical access to another rat (Rat/Mesh or Rat/Phys, respectively) or to a tennis ball (Ball/Mesh or Ball/Phys, respectively) unconditioned stimulus (US). Only the Rat/Phys group exhibited CPP after 2 CS-US pairings; however, after 8 CS-US pairings, the Rat/Mesh and Ball/Phys groups also exhibited CPP. During conditioning, the rat US elicited more robust approach and contact behavior compared to the ball, regardless of physical or restricted access. The incidence of contact and/or approach increased as the number of exposures increased. The results suggest that the rank order of US reward efficacy was physical contact with a rat > limited contact with a rat > physical contact with a ball, and that rough-and-tumble play is not necessary to establish social reward-CPP. The findings have important implications for emerging drug self-administration models in which two rats self-administering drug intravenously have limited physical contact via a mesh barrier shared between their respective operant conditioning chambers. |
| Databáze: | OpenAIRE |
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