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In studies on superfused slices obtained from the rat hippocampus, we extracellularly recorded field EPSP (fEPSPs), pharmacologically isolated components of these fEPSP, which were related to activation of synaptic NMDA-glutamate receptors, and neuronal responses of the dentate gyrus, which were mediated by activation of extrasynaptic NMDA-glutamate receptors. Recordings were performed in junctions...
Electrophysiological and biochemical experiments on slices of the rat dorsal hippocampus demonstrated that dexamethasone (100 nM) augmented and prolonged the depressive effect of noradrenaline on synaptic transmission in the CA1 zone; this effect is related to weakening of the uptake of noradrenaline by neurons. The effect of dexamethasone is mediated by glucocorticoid receptors. Inhibitors of presynaptic...
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