Abstract
The effects of post-trial naloxone administration were studied in two inbred strains of mice, C57BL/6 (C57) and DBA/2 (DBA), tested in two different experimental conditions. These were a Y-water maze (requiring escape from water) and the Yerkes — Thompson — Bovet-Nitti apparatus for pattern discrimination (requiring escape from electric shock). Two series of experiments were carried out. In the first series, naloxone improved acquisition in DBA and impaired acquisition in C57 mice either trained to swim towards the dark or to discriminate between oblique bars. Light-oriented behavior, perhaps due to non-conditioned tendencies, was improved in the Y-water maze following naloxone administration in both strains.
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Castellano, C. Strain-dependent effects of naloxone on discrimination learning in mice. Psychopharmacology 73, 152–156 (1981). https://doi.org/10.1007/BF00429207
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DOI: https://doi.org/10.1007/BF00429207