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An in vitro model of persistent epileptiform activity was developed to study the mechanisms involved in epileptogenesis. Extracellular recordings were obtained from rat neocortical slices exposed to magnesium-free solution for 2 h. During exposure to magnesium-free solution spontaneous epileptiform activity consisting of interictal bursting and ictal-like discharges were observed. Interestingly,...
Whole-cell recordings techniques were used to record pharmacologically isolated fast inhibitory postsynaptic currents (IPSCs) in CA1 pyramidal neurons from rat hippocampal slices. Repetitive extracellular stimulation up to 10 Hz progressively reduced steady-state fast IPSC amplitude. At low stimulation frequencies (up to 1 Hz), this attenuation was characterized by a positive shift of IPSC reversal...
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