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1 Laboratory of Psychobiology, Department of Psychiatry; Department of Pharmacology, Harvard Medical School, Boston, Massachusetts
Times between successive lieks (interresponse times) were determined for rats licking water from a (drinking tube. The distribution of interresponse times during bursts of rapid licking was highly peaked and was stable over long periods of time and under different degrees of water deprivation. Dose-effect relations were determined for chlorpromazine, pentobarbital, chlomdiazepoxide and d-amphetamine on the mean and standard deviation of interresponse times and several other characteristics of the rats' drinking behavior. Both the mean and the standard deviation of interresponse times during bursts of rapid licking were increased by chlorpromzaine, pentobarbital and chlordiazepoxide. In contrast, d-amphetamine slightly decreased the means interresponse time at low doses and increased it at higher doses. Chlorpromazine and d-amphetamine caused a decrease in total volume of water conusumption. Chlordiazepoxide and low doses of pentobarbital increased water consumption, but higher doses of pentobarbital resulted in a decrease in volume cousumed.
Submitted on June 24, 1971
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