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• W1969940935 abstract "The effects of early undernutrition on behavior and brain biochemistry were examined in rats. At weaning, rats were provided either an ad lib diet (control group) or maintained at 80% of the weight of their control littermates (undernourished group). Three weeks into the diet they were tested in an open field. After 6 weeks of diet, HPLC analyses were conducted on sample brains from each group to assess levels of dopamine and metabolites, respectively dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA) in the striatum. At seven weeks of diet, remaining rats were trained in an 8-arm radial maze, and a retention test conducted 72 h after attaining the learning criterion. At fourteen weeks of diet, sensory reactivity was measured by tail-immersion in a water bath maintained at constant temperature 50 ± 1 °C. Undernourished rats exhibited hyperactivity and increased exploratory behavior in the open field, as well as increased sensory reactivity in the tail flick test. In the radial maze, however, undernourished rats did not differ from controls in either learning or retention. Haloperidol (i. p. injection) impaired retention by control but not undernourished animals. HPLC analyses showed an increase in dopamine turnover in the striatum of undernourished rats. Our results suggest that, unlike its effects when induced immediately at birth or in adulthood, undernutrition at weaning does not appear to influence learning and retention but induced an hyperactivity and alterations in striatal DA turnover which was associated with a decrease in responsiveness to i. p. haloperidol injection." @default.
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• W1969940935 date "2005-09-01" @default.
• W1969940935 modified "2023-10-03" @default.
• W1969940935 title "Effects of postweaning undernutrition on exploratory behavior, memory and sensory reactivity in rats: Implication of the dopaminergic system" @default.
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• W1969940935 doi "https://doi.org/10.1016/j.physbeh.2005.07.008" @default.
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