The influence of learning on morphine an
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Gerald F. Gebhart; Arnold D. Sherman; C. L. Mitchell
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Article
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1971
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Springer
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English
β 606 KB
The influence of "learning" on the development of tolerance to the analgesic effect of morphine in rats was examined employing the hot plate procedure. A tested-reinforced (Tr) group and its yoked-control, a tested-non-reinforced (Tnr) group, received identical exposure to the testing procedure; the