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Approved For Release 2008 AR ERENT PAIROP96-00788R001300020001-6 ST-CS-01-169-72 July 1972 6. (U) A Soviet review article concerning the effects of superhigh frequency (wavelength of from one millimeter to one meter) on the central nervous system is worth incorporation into this report. Although the work is primarily physiological, it is meaningful because it contains some of the important areas of interest to the Soviets and could be correlated to Soviet work with other frequen- cies. Kholodov (297) reports that the effect of SHF on the functions of the central nervous system is of particular interest. So far, few studies have dealt with this subject. Kholodov contends that foreign investigators (chiefly American) use an SHF field with an intensity on the order of tens of watts/sq cm, which results in a considerable heating of the brain (above 40 degrees C). Depending upon the duration of the radiation, mice and rabbits have stopped eating for some time, or have made spasmodic movements, and even died. Post-mortem examination of the animals have shown that the action of the powerful SHF field has resulted in destruction of the brain cells. Especially extensive destruction has been observed in the inter-brain and mid-brain. When the head of a monkey is exposed to a strong SHF field, the animal behaves normally for the first minute or two, and then covers his eyes and starts to go to sleep. But a minute later he wakes up; the rate of respira- tion increases; the pupils dilate despite the bright illumination; and there is a heavy secretion of saliva. After some time the monkey begins to shake with convulsions and utter cries. If the radiation is discontinued, by the following day the monkey in no way differs from other monkeys who have not been exposed to radiation. If exposure is continued, the animal dies after a few minutes. Experiments have shown that when men or animals are exposed to radiation, there is a change in the sensitivity to sound, light, and olfactory stimuli. A study of the receptors in the skin, the gastrointestinal system, and the circulatory system has shown slight changes in them after exposure to the action of SHF. Conse- quently, the SHF field can act on the first link in the reflex arc. At the same time, SHF may act directly on the central nervous system. On the other hand, the appearance of slow waves in the record of the biological currents of the cerebral cortex, the inhibition of reflex activity, and the appearance of various vegetative reactions indicate action of the SHF field on the inter- brain, where the higher vegetative centers are located. The data from physiological experiments check very well with the results from morphological investigations. After exposure to SHF, rever- sible structural changes were observed in the cerebral cortex and in the inter-brain. It may be assumed that those areas of the brain are the most sensitive to the action of an SHF field, although if the intensity or duration of the action is increased, other 109 CONFIDENTIAL (This page is UNCLASSIFIED) Approved For Release 2003/09/10 : CIA-RDP96-00788R001300020001-6