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- W1523924919 abstract "The electrical stimulation of the dorsal raphé nucleus was used as a training cue in a discrimination paradigm. Sprague-Dawley rats were trained to discriminate between electrical stimulation (ES; 200 μA) of the dorsal raphé nucleus (DRN) and non-stimulation. This was accomplished by associating ES with intraperitoneal (i.p.) injection of lithium chloride (LiCl), following the session with electrical stimulation. This made the drinking of saccharin during ES aversive by conditioned taste aversion. Following training, rats decreased saccharin consumption in ES sessions. This discrimination was learned within three pairings of the ES with LiCl. Lowering the ES current to 50–100 μA resulted in levels of saccharin consumption similar to non-stimulation levels, whereas 150 μA showed a response intermediate between the stimulation response at 200 μA and non-stimulation. The discrimination of ES of the DRN (200 μA) was not affected by prior administration of the 5-HT 2 antagonist ketanserin (1 or 2 mg/kg, i.p.), suggesting that activation of 5-HT 2 receptors is not the primary discriminative cue generated by ES. However, the 5-HT 2A/2C agonist DOI (0.25–0.5 mg/kg, i.p.), substituted for ES of the DRN, i.e. animals reduced saccharin consumption following DOI administration. This substitution of DOI for ES was antagonized by the administration of ketanserin (1 mg/kg, i.p.). These results suggest that ES of the DRN has properties that are similar to the activation of 5-HT 2A/2C receptors by DOI. However, other stimuli such as activation of other 5-HT receptors are also involved, given that the discriminative cues of ES are not blocked by the 5-HT 2A/2C antagonist ketanserin. © 1997 Elsevier Science Ltd." @default.
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- W1523924919 date "1997-04-01" @default.
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- W1523924919 title "Effects of Ketanserin on the Discrimination of Electrical Stimulation of the Dorsal Raphé Nucleus in Rats * *Presented in part at the Society for Neuroscience Meeting, Miami Beach, 1994 (Mokler et al., 1994b)." @default.
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- W1523924919 doi "https://doi.org/10.1016/s0028-3908(97)00053-1" @default.
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