[Mechanisms of the origin of morphological changes in the central nervous system in various methods of chilling unanesthesized white rats].

In comparing the thermoregulation shifts under different methods of chilling of unanesthetized albino rats with morphological changes in different parts of the CNS the role of the afferent impulses from the chilled body tissues, and of the thermoregulating stimulation of the nerve structures in the origination of morphological changes in the neurons of the reticular formation, mammillary bodies, and the spinal cord was established. Morphological changes in the neurons of the preoptic area of the anterior hypothalamus and the cortex of the large hemispheres were apparently caused by the direct influence of low temperatures upon the brain.