SG1A Approved For Release 2000/08/08 : CIA-RDP96-00789R003100280001-7 Approved For Release 2000/08/08 : CIA-RDP96-00789R003100280001-7
Approved For Release 2000/08/08 : CIA-RDP96-00789R003100280001-7  - Reactions of the Central Nervous System to Peripheral Effects of Low-Intensity EHF Emission Natalia N. Lebedeva Institute of Higher Nervous Activity and Neurophysiology of the USSR Academy of Sciences Abstract The study of reactions of human CNS to peripheral effects of EHF emission, created by therapeutic apparatus Yav-I (the wave length is 7.1 mm) revealed restructuring of the space-time organization of biopotentials of the brain cortex of a healthy individual which indicate development of a non-specific activation reaction in the cortex. The study of sensory indication of EHF field with these parameters showed that it is can be reliably detected at the sensory level by 80% of the subjects. Introduction In the process of study of reactions of living systems with a different level of organization to millimeter waves, non-thermal (informational) effects were discovered [1-3]. The distance from the place affected by the emission to the location of appearance of the biological reaction may be hundreds and thousands times larger than the distance at which the emission decreases one order of mag- nitude. This fact demonstrates participation of the nervous system in perception of millimeter-range emission by living organisms. There is a wide-spread opinion that biological effects of EMF are realized in humans at a subsensory level. However, in the recent years there is interest to their sensory detection in the Approved For Release 2000/08/08 : CIA-RDP96-00789R003100280001-7
Approved For Release 2000/08/08 : CIA-RDP96-00789R003100280001-7 form of radiosound, magnetophosphenes, or skin sensations [47-9]. Changes in EEG to EMF effects were most often observed in the form of an increase in the slow waves and spindle-shape oscillations in reptiles, pigeons, rats, rabbits, monkeys, and humans [10-12]. | we have not found studies devoted specifically to the effects of millimeter waves on the central nervous system in the available literature; thus, the current study has been undertaken. This study employed electrophysiological and psychophysiological methods for the evaluation of the state of the central nervous system while affected by EMF. Methodology Twenty healthy subjects aged 17 to 40 years participated in the experiments. Apparatus Yav-I with the wave length of 7.1 mm was used as the EMF source. A flexible waveguide with the power of 5 mW/cem* at its end was directed at He-Gu [4 Gi] acupuncture point in the right or left hand of the subject. Two experimental series have been conducted. In the first one (10 subjects, 10 tests with each subject, 20 instances of field action in each test), sensory detection of the field was studied. The length of the EMF signal or control trial without the signal was 1 minute. To evaluate the subject’s EMF sensitivity, the indicator of response strength (RS) was used, i.e., the ratio between the number of correctly identified trials and the total number of EMF signals. Another indicator used was the level of false alarms (FA), i.e., the ratio between the number of false Approved For Release 2000/08/08 : CIA-RDP96-00789R003100280001-7
Approved For Release 2000/08/08 : CIA-RDP96-00789R003100280001-7 - positives to the total number of control trials. The significance of the difference between RS and FA was evaluated by using the Mann-Whitney test. The analysis of latent time (T..) included total histograms of true responses and false alarms. In the second series (10 subjects, 11 tests with each, including placebo tests) the exposure to the field was equal to 60 minutes. EEG recording was conducted before and after the EMF influence by using EEG-16S (Hungary), with 4 paired leads, located according to 10-20% system (in the frontal F-F, central C-C, parietal P-P and occipital O-O areas). As the reference electrode, a joint ear electrode was used. Together with EEG recording on paper, the data were fed for on-line processing into an IBM-PC Amstrad computer using spectrum coherent analysis by means of rapid Fourier transformations with plotting power spectra and computing mean coherence levels. Selected for the study were frequencies from 2 to 30 Hz in major physiological ranges of the EEG spectrum. Results and discussion In the first experimental series, the subjects showed a division into two unequal subgroups according to their RS and FA indicators. The first subgroup (8 individuals) could reliably [at a statistically significant level] detect EMF: the differences between RS and FA were significant according to Mann-Whitney test, the means for RS and FA being 64.3% + 10.5% and 20.6% +,11.2%, re- spectively. The second subgroup (2 individuals) could not reliably Approved For Release 2000/08/08 : CIA-RDP96-00789R003100280001-7