alexa Differential effects of ethanol on memory in adolescent and adult rats.
Microbiology

Microbiology

Journal of Antivirals & Antiretrovirals

Author(s): Markwiese BJ, Acheson SK, Levin ED, Wilson WA, Swartzwelder HS

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Abstract Previous studies have shown that ethanol inhibits memory-related synaptic activity and plasticity more potently in hippocampal slices from immature rats, compared with those taken from adults. We therefore hypothesized that ethanol would more potently attenuate the acquisition of spatial memory in adolescents, compared with adult rats. Adult (65 days of age) and adolescent (30 days of age) male rats were given five daily trials on a spatial memory task in a Morris Water Maze. The animals from each age group were subdivided into three subgroups. Each day, thirty minutes before training, the animals in each subgroup were given an intraperitoneal injection of 1.0 g/kg of ethanol, 2.0 g/kg of ethanol, or the saline vehicle. Training continued daily until the control animals had reached a performance criterion. Ethanol treatment significantly impaired spatial memory acquisition in the adolescent rats, but did not impair acquisition in adult rats. A separate experiment with identical treatment groups showed that ethanol did not impair acquisition of a nonspatial memory task in the water maze in animals from either age group. These experiments show that the acquisition of spatial, but not nonspatial, memory is more potently impaired by ethanol in adolescent animals, compared with adults.
This article was published in Alcohol Clin Exp Res and referenced in Journal of Antivirals & Antiretrovirals

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