[The effect of the ambient temperature and motor activity on brain temperature in bullfinches].

In increasing of the ambient temperature, the difference between the brain and body temperatures diminished from 1.4 degrees C (at the ambient temperature 0 degree C) to 0.5 degrees C (at the ambient temperature +37 degrees C) in bullfinches, the brain temperature being always the lower one. In combination of high ambient temperature and locomotor activity the brain-body temperature difference increased as the body temperature had raised higher than the brain one.