Influence of housing conditions on the acquisition of intravenous heroin and cocaine self-administration in rats

  title={Influence of housing conditions on the acquisition of intravenous heroin and cocaine self-administration in rats},
  author={Michael A. Bozarth and Aileen Murray and Roy A. Wise},
  journal={Pharmacology Biochemistry and Behavior},
Group-housed and individually housed rats were tested for the acquisition of a lever-pressing response reinforced by intravenous heroin or cocaine; animals in each housing condition quickly learned to self-administer drug. In the first experiment the isolated rats learned to self-administer heroin earlier than the group-housed animals, but the two groups self-administered similar levels of heroin by the fifth week of testing. In the second experiment cocaine self-administration was learned with… Expand

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