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The behavioral effects of repeated methylphenidate (MPH) treatment were assessed in young rats. In 4 experiments, rats (starting at Postnatal Day 10 or 16) were pretreated on 5 consecutive days with(More)
kappa-Opioid receptor agonists both increase the locomotor activity of preweanling rats and induce antinociception. To determine whether dopamine (DA) D(1) receptors are necessary for either of these(More)
Repeated exposure to psychostimulant drugs results in conditioned activity and behavioral sensitization. Nonassociative cellular changes are necessary for behavioral sensitization, while associative(More)
The purpose of the present study was to determine whether exposure to amphetamine during the preweanling period would impact the learning or reward processes of rats tested in adulthood. In three(More)
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