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- W2040787803 abstract "Converging lines of evidence indicate an important role for the basal forebrain cholinergic system in memory processes. The principal origin of the cholinergic projection to the neocortex appears to be the magnocellular neurons in the region of the nucleus basalis of Meynert (NbM). We examined the effects of bilateral lesions of the NbM on retention of shock avoidance training by stereotaxically injecting rats with 0.5 microliter of ibotenic acid (14 micrograms/microliter) into the NbM. Two weeks later rats were given passive avoidance training and tested for retention of the original avoidance habit 5 min, 30 min, or 24 hr later. Rats with lesions of the NbM showed significantly impaired shock avoidance performance compared to non-operated controls at both 30 min and 24 hr, but not at 5 min after training. Lesioned animals also showed a significant decrease in cortical choline acetyltransferase (CAT) and acetylcholinesterase (AChE) activities. No differences in muscarinic receptor binding or plasma cholinesterase activity was observed. The results demonstrate the usefulness of NbM lesions as a model for studying the role of the basal forebrain cholinergic system in memory processes." @default.
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- W2040787803 date "1985-06-01" @default.
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- W2040787803 title "Further characterizations of the nature of the behavioral and neurochemical effects of lesions to the nucleus basalis of meynert in the rat" @default.
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- W2040787803 doi "https://doi.org/10.1016/0197-4580(85)90030-2" @default.
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