Abstract
Conclusion
The effects of immersion of frogs in water of 38 to 40°C on the threshold of denervated skeletal muscle and on the electrical activity of the brain have been investigated. (1) The muscular threshold to electrical stimulation is increased, and returns to normal after 5 to 10 minutes. (2) The brain waves disappear almost completely. After several minutes fast alpha activity appears in single bursts, which occur more often. After 10 to 15 minutes the normal brain pattern returns. (3) The effects on the muscle and on the brain do not appear to be related with each other since the muscular threshold returns to normal before the appearance of a normal electroencephalogram.
The present experiments demonstrate for the first time that the brain is subject to a reversible heat paralysis as other organs.
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