MORPHOLOGIC AND PATHOPHYSIOLOGIC SIGNS 311 



encephalic region and in the vegetative structures situated in this region 

 also have great significance. 



In the conditions created as a result of exposure to radiation, the correc- 

 tive activity of this part of the nervous system in relation to the various 

 endocrine and vegetative structures becomes particularly important. Dis- 

 turbance of this correlation or of the correct interrelationships between the 

 diencephalic structures and the cerebral cortex will obviously bring about a 

 whole series of vegetative and endocrine disturbances, such as are observed 

 at all stages of radiation sickness. 



Functional disturbance of the higher parts of the brain depends on the 

 direct influence of radiation on the nerve cells and on disturbance of the 

 activity of the subcortex and receptor structures. 



Functional disturbance of the cerebral cortex has an effect on the charac- 

 ter of the higher nervous activity and leads to the loss of one of the main 

 functions of the cortex, namely, correct adaptation of the individual's reac- 

 tions to environmental changes. 



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