Abstract
In the absence of oxygen nerve conduction is suspended in several hours, the activity of each fibre becoming gradually less until it blocks. Conduction has been shown to depend on oxidations, and the long persistence of activity with outside oxygen excluded to depend on the existence in nerve of an oxidizing reserve. The rapid recovficial action of Ringer on a nerve that has failed to recover from cold block. Finally nerves soaked in isotonic NaCl for 40 minutes before the start of asphyxia, though still fully recovering in oxygen, no longer show any recovery in Ringer. Nerves soaked in NaCl followed by Ringer behave as if they had been in Ringer throughout.
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