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- W2016736110 abstract "The present study investigated whether atipamezole (ATI), a potent α2-adrenoceptor antagonist that increases the release of noradrenaline in brain, improves attention in rats. Thus, the effects of ATI on the performance of adult male rats in the five-choice serial reaction time task were studied. Food-deprived rats were trained to detect and respond to brief flashes of light presented randomly in one of five spatially diverse locations. The effects of single-dose administration of ATI (0.03–3.0 mg/kg) on the performance of rats under different parametric manipulations of the task were tested: 1) the visual stimuli were presented at unpredictable intertrial intervals (ITIs) or b) the intensity (brightness) of visual stimuli was reduced, thus placing an additional load on attentional processing for animals. Presenting the stimuli earlier than normally or reducing its intensity markedly impaired the choice accuracy of rats. At doses of 0.03, 0.3, and 1.0 mg/kg, ATI improved the choice accuracy of rats when tested using reduced stimulus intensity. ATI 3.0 mg/kg did not affect accuracy performance when tested using reduced stimulus intensity but impaired it when tested using unpredictable ITIs. The other doses of ATI (0.03, 0.3, and 1.0 mg/kg) did not markedly affect choice accuracy of rats tested using unpredictable ITI. Our results could be explained by the assumption that an acute, systemic administration of ATI affects arousal mechanisms and facilities the processing of visual stimuli related to reward." @default.
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- W2016736110 date "1993-05-01" @default.
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- W2016736110 title "Dose- and parameter-dependent effects of atipamezole, an α2-antagonist, on the performance of rats in a five-choice serial reaction time task" @default.
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- W2016736110 doi "https://doi.org/10.1016/0091-3057(93)90095-b" @default.
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