Abstract
A small modification to a voltage-clamp set-up for studying isolated neurons, and the use of simple hippocampal slices allowed stable recording of excitatory postsynaptic currents (EPSCs) that were evoked by stimulating the Shaffer's collaterals of individual CA1 pyramidal neurons. With the developed method EPSCs and focal extracellular potentials could be recorded simultaneously. It was confirmed that the EPSC consists of two components that are mediated via N-methyl-D-aspartate (NMDA)- and non-NMDA-receptors. The effects of different blockers of these receptors on the postsynaptic current were investigated, as were the effects of adenosine, which, depending on its concentration, could either depress or potentiate the synaptic transmission.
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