Summary
Rats injected with scopolamine after daily training sessions on a fixed-interval schedule of reinforcement develop performances similar to those of uninjected controls rats. When all the rats are given the drug before the session, those originally trained with scopolamine after the session differ from the controls by showing as much tolerance to the drug as do rats trained from the start with scopolamine before the session.
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Research supported by grants GB-316 and GB-2541 from the National Science Foundation and by grant MH-10397 from USPHS to the University of Chicago.
Charney was an NIMH predoctoral trainee
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Charney, N.H., Reynolds, G.S. Tolerance to the behavioral effects of scopolamine in rats. Psychopharmacologia 11, 379–387 (1967). https://doi.org/10.1007/BF00405021
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DOI: https://doi.org/10.1007/BF00405021