36 male albino rats were trained to bar-press for food on a VR-3 reinforcement schedule before administration of either 0, 4.75, or 475 rad. whole body x-irradiation combined factorially with Nembutal or saline. The 475-rad. condition produced a marked reduction in response rate within 24 hr. of exposure. A similar but less pronounced decrement was attributed to residual narcosis. No interaction of Nembutal with x-irradiation was obtained.
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References
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