State dependent and/or direct memory retrieval by morphine in mice

@article{Nishimura2005StateDA,
  title={State dependent and/or direct memory retrieval by morphine in mice},
  author={Mika Nishimura and Yasuyuki Shiigi and Hiroshi Kaneto},
  journal={Psychopharmacology},
  year={2005},
  volume={100},
  pages={27-30}
}
Mice were trained in step-down and step-through type passive avoidance learning tasks and given retention tests. Pre-training administration of morphine impaired retention, the effect recovering completely after an additional injection of the same dose of morphine given 30 min before the retention test. Amnesia produced by scopolamine, cycloheximide and electroconvulsive shock was also reversed by pre-test morphine. Pre-test saline also reversed the morphine-induced memory impairment to some… Expand
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