Antagonism of N‐methylaspartate and synaptic responses of neurones in the rat ventrobasal thalamus by ketamine and MK‐801

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Abstract
1 Extracellular single neurone recordings were made in the ventrobasal thalamus of urethaneanaesthetized rats. 2 Iontophoretically and intravenously administered ketamine and MK-801 were found to be selective antagonists of responses of neurones to iontophoretically applied N-methylaspartate. 3 Both antagonists, administered in N-methylaspartate-selective quantities, reduced the synaptic responses of ventrobasal thalamus neurones to a two-second air jet directed at the peripheral receptive field.