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Low (1 mM), but not 10 mM, concentrations of ethanol selectively potentiate current gated by α 4 β 2 δ subunit combinations of the gamma-aminobutyric acid type A (GABA A ) receptor, a subtype increased in hippocampus after withdrawal from progesterone in a rodent model of premenstrual anxiety. In the current study, we tested the hypothesis that the anxiolytic effect of ethanol...
Acute ethanol administration impairs performance in many cognitive tasks that are dependent on hippocampal function. For example, acute ethanol administration produces dose-dependent impairments in spatial learning. Ethanol also decreases the spatial specificity of hippocampal place cells. Such findings raise the possibility that ethanol affects learning and memory by altering, either directly or...
We investigated the effect of acute ethanol administration and acute allopregnanolone administration on spontaneous hippocampal pyramidal cell neural activity. Both agents produced significant reductions in spontaneous firing rate of hippocampal pyramidal neurons at a medium and high doses. Furthermore, blockade of allopregnanolone biosynthesis by preadministration of finasteride, a 5α-reductase blocker,...
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