Abstract
Summary
The time of onset and severity of convulsions was observed in 3 groups of mice exposed to 90 psi of oxygen, the first receiving the oxygen alone, the second 400 psi of helium plus oxygen and the third 400 psi of nitrogen plus oxygen. All the animals in groups one and two convulsed within 15 minutes of exposure to oxygen at this pressure but in the third group much less violent seizures appeared in only 23% of the mice and were delayed 44% in time of onset. Voluntary movements and postural reflexes were not seriously disturbed by this pressure of nitrogen.
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