The effects of various metabolic activators on the glucose metabolism of the perfused cat brain have been investigated. (1) When the perfusion is done with the blood containing cytidine monophosphate, the glucose metabolism of the brain is enhanced, as compared to the perfusion with the blood without cytidine monophosphate. There is no marked change in the cerebral metabolic rate and in the contents of intermediate metabolite of glucose in the brain. (2) Citicoline enhances the incorporation of blood glucose into the brain and its metabolism in the brain. It increases slightly the cerebral blood flow rate and decreases the accumulation of lactate in the brain. (3) Either Pyrithioxin or Meclophenoxate has no effect on the glucose metabolism of the brain nor on the cerebral metabolic rate.
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