Abstract Twenty-eight Wistar rats treated orally with 20% ethanol solution, were divided into two groups: adult group (n = 19) and aged group (n = 9) consisting of animals aged 4 and 12 months, respectively, at the beginning of the treatment. Neurons from the basal nucleus region were counted and the percentage of choline acetyltransferase-immunoreactive cholinergic neurons was determined in adjacent sections. Acetylcholine release and choline-acetyltransferase activity in the cerebral cortex were assessed in the same animals.
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