[Brain temperature in small birds and mammals].

The brain and body temperature were simultaneously recorded in bullfinches and mice at the ambient temperature 20-22 degrees C. The data obtained showed the existence of constant brain/body temperature difference in birds (the brain temperature was lower by 1.8 degrees C). The brain temperature in mice was higher than the rectal one by 0.4 degrees C. There were constant rapid oscillations of the brain temperature with the period of 1-2 min and the amplitude of 0.05-0.10 degrees C as well as slow oscillations with the period of 11-20 min and the amplitude of 0.5-1.5 degrees C both in bullfinches and mice.