The effect of forced cooling was studied as applied to the contents of ammonia, glutamine, glutaminic, asparaginic and alpha-amino butyric acids in the brain of sousliks woken-from hibernation. The cooling of the woken sousliks to the body temperature of 30, 20 and 25 degrees C decreased to some extent the ammonia content in the brain. A deeper hypothermia (10 degrees C) causes its 60,4% decrease as compared to the ammonia amount in woken animals. The cooling of the animals to 30, 25, 20 and 10 degrees C considerably decreases the contents of glutamine, glutaminic acid and GABA in the brain tissue.
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