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• W2026053038 abstract "The present study had two goals (1) to examine the effects of treatments with nicotinic agonist (nicotine) and antagonist (mecamylamine) on working memory in normal adult rats (14 months of age), and (2) to determine if treating aged (36 to 42 months of age), memory-impaired rats with nicotine could improve their memory function. Memory testing was carried out using a delayed non-matching to position paradigm in a T-maze. Rats were trained to run down one arm of the maze (e.g., right) on an information run and then, after a variable memory delay period of 10, 90, or 180 sec, run down the other arm (e.g., left). In normal adult rats after water injection, memory accuracy was inversely related to memory delay (> 90, 75, and 67% accuracy at the 10, 90, and 180 sec delays, respectively). Administration of nicotine (0.1 or 0.4 mg/kg), or mecamylamine (2.5 or 5 mg/kg), or combinations of these drugs had no significant effects on memory in these rats. However, mecamylamine alone or in combination with nicotine reduced running speed in the T-maze in normal adults, indicating that the drugs did produce some behavioral effects. In aged rats, memory accuracy after water injection was much lower than that of younger adults, averaging 64, 57, and 50% at 10, 90, and 180 sec delays. Interestingly, nicotine injections of 0.1 or 0.4 mg/kg resulted in highly significantly improved accuracy in the memory task. The deficit in memory accuracy in aged rats, evident even at the shortest delay period (10 sec), suggests that the rats may have had impairments in attention or visual discriminatory ability. If this is so, then the beneficial effects of nicotine observed in this study may be more related to its effects on attention rather than memory directly. © 1994 Wiley-Liss, Inc." @default.
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• W2026053038 title "Effects of nicotinic agonists and antagonists on spatial working memory in normal adult and aged rats" @default.
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• W2026053038 doi "https://doi.org/10.1002/ddr.430310105" @default.
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