[Effect of cold adaptation and brief exposure to cold on the resistance of animals to hypoxic hypoxia].

Cold adaptation of white rats (45 days, 2 degrees C) considerably increased their resistance against hypoxic hypoxia as indicated by an increase of life duration under hypoxia, a decrease in seizure frequency, and the absence of changes in monoamine oxidase catalytic properties typical for hypoxia. Cold stress, however, reduced the animals resistance against hypoxic hypoxia.