Abstract
The effects of ethanol injections on the F2 offspring of the cross between large-brain (LB) and small-brain (SB) mouse strains selected for high and low relative brain weights, respectively, have been studied. The parental strains have significantly differed in brain weight for many generations. The effects of ethanol (2.4 g/kg) have been compared in four subpopulations of mice that differ pairwise in brain weight. One pair of subpopulations has been derived from the hybrid group and the other, from generation 22 of selection of the parental strains. The results of ANOVA have demonstrated that brain weight is related to the behavioral response to ethanol injections. The parameters of stereotyped behavior, which increased in after ethanol injections and reflected the decrease in exploratory activity, were different in mice with high and low relative brain weights. The pattern of behavioral changes after ethanol injections is the second (after increased learning ability) behavioral trait found to be correlated with brain weight.
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