BRAIN-LESIONS AFTER MILD GRADES OF RADIAT ION-SICKNESS

It is indicated that all subjects who had acute grade I radiation sick ness of the Chernobyl accident showed disorders of the brain functions 5-6 years later. They evidence involvement of all brain structures bu t especially the subcortical brainstem portions. Marked memory reducti on was also noted. The neurological deficit was not pronounced but the patients developed a syndrome of significant disadaptation, which had a progressive character. The authors propose to term these changes as postradiation encephalopathy of primary-radiation and intoxication ge nesis.