K.Yu. Golovtseva - Master, Department of Biomedical Techniques, Bauman Moscow State Technical University
L.V. Zhorina Ph.D. - (Phys.-Math.), Assistant Professor, Department of Biomedical Techniques, Bauman Moscow State Technical University
K.G. Maximova - Master, Department of Biomedical Techniques, Bauman Moscow State Technical University
Plenty of artificial sources of extremely low-frequency (ELF) electromagnetic (EM) fields (ELFEMF) for both domestic and medical physiotherapeutic purposes necessitates the study of its influence on biological objects, in particular humans. At the moment human’s special receptors EMFs have not discovered. However, even small strength ELFEMF with non-thermal energy, corresponding to the natural level, lead to significant biological effects. The brain of man and animals is particularly sensitive to the action of weak fields.
In this work, the exposure to ELFEF was carried out in the form of a sequence of variables (bipolar) rectangular voltage pulses forming an electric field, with changes in the repetition frequency in the range from 80 to 30 Hz, as close as possible to the place of impact without physical contact of the field source with the body. The amplitude of the output pulses forming the electric field was 210 ... 220 V, the resistance at the electrode output is more than 2 MΩ. Exposure was carried out on the region of the back with an average speed of source movement for 10 minutes symmetrically relative to the spine for cervical, thoracic and lumbar. Two courses of 10 procedures were performed. Thermograms of the distribution of temperature fields along the body were obtained. Before the measurement began, the undressed body was adapted to the ambient temperature for 10 minutes. Further during the whole measurement the human was not dressed. Measurements of the temperature field occurred before the procedure, immediately after it, and then several times after the procedure. In total, the dynamics of the thermal fields and their distribution along the body were observed for 120 minutes.
It was shown that the temperature of the body surface was lower than the original between 0 and 20 min after exposure, and then there an overall heating of the body with a maximum of 40...60 minutes after the procedure was observed. Decrease and subsequently increase in temperature was observed from the back and front, so we can speak of not a local reaction to the exposure, but of the general response of the body. The greatest temperature changes were observed at the horizontal level under the blades. To verify the version of the possible addictive of the organism to the exposure to ELFEF, a similar visualization of the back's thermal field in the course of repeated exposure was made. Comparison of the data of the first and repeated course of exposure revealed a similar character of the temperature curves, i.e. absence of habituation. Since there is no change in the external environment during and after the exposure to nonthermal energy ELFEF in our case, peripheral temperature receptors of skin should not be involved in observable effect. From the literature data it is known that after the action of EF, inhibition of the hypothalamus takes place. It seems possible that the decrease in the surface temperature of the body after the exposure to ELFEF occurs due to inhibition of the hypothalamus, which ultimately leads to an increase in heat transfer. The increase in body surface temperature observed after it’s fall can be explained by activation of the center of heat production due to a decrease in temperature in the hypothalamus caused by the previous process of heat loss by the body.
- Kudrjashov Ju.B., Rubin A.B. Radiacionnaja biofizika: sverhnizkochastotnye jelektromagnitnye izluchenija. M.: FIZMATLIT. 2014. 216 s.
- Pticyna N.G., Villorezi Dzh., Dorman L.I., Juchchi N., Tjasto M.I. Estestvennye i tehnogennye nizkochastotnye magnitnye polja kak faktory, potencial'no opasnye dlja zdorov'ja // UFN. 1998. T. 168. S. 767-791.
- Sajt kompaniiAires Technologies http://airestech.ru/me¬dia/em-smog#a_menu (data obrashhenija 18.05.2017).
- Kudrjashov A.A., Dmitrieva V.A. Informacionnyj pod¬hod k probleme vozdejstvija sverhslabyh izluchenij na biologicheskie ob#ekty // Mir nauki, kul'tury, obrazovanija. 2016. № 4(59). S. 163-166.
- Kheifets L., Renew D., Sias G., Swanson J. Extremely low frequency electric fields and cancer: Assessing the evidence // Bioelectromagnetics, 2010, №31. P. 89–101. doi:10.1002/bem.20527
- Kulaeva O.N. Belki teplovogo shoka i ustojchivost' rastenij k stressu // Sorosovskij obrazovatel'nyj zhurnal. 1997. № 2. S. 5-13.
- Goodman R. Initial interactions in electromagnetic field-induced biosynthesis // J. Cell. Physiol. 2004. № 199. P. 359–363. doi:10.1002/jcp.20004.
- Blank M., Martirosov S. Inhibition of F0F1-ATPase activity in AC-fields // Bioelectrochem. Bioenerg. 1995. V. 37. P. 153–156.
- Abramovich S.G., Barash L.I., Meleshko T.I. Gemodina¬micheskie jeffekty lechenija gipertonicheskoj bolezni jelektrostaticheskim vibromassazhem // Sibirskij me¬di¬cinskij zhurnal (Irkutsk). 2004. T. 46. № 5. S. 44-48.
- Ivanova A.O., Obrubov S.A., Rumjancev S.A., Stenina M.A., Kljuchnikov S.O., Polivoda M.D. Immunotropnye jeffek¬ty impul'snogo nizkochastotnogo jelektromagnitnogo polja v jeksperimente // Vestnik Rossijskogo gosudarstvennogo medicinskogo universiteta. 2012. № 3. S. 63-67.
- McNamee D.A., Corbacio M., Weller J.K., Brown S., Stodilka R.Z., Prato F.S., Bureau Y., Thomas A.W., Legros A.G. The response of the human circulatory system to an acute 200 μT, 60 Hz magnetic field exposure // Int Arch Occup Environ Health. 2011. V. 84. № 3. P. 267277. doi: 10.1007/s00420-010-0543-1.
- Mironov S.P., Vetrilje S.T., Nacvlishvili Z.G., Morozov A.K., Krupatkin A.I., Kuleshov A.A., Hohrikov G.I., Vetrilje M.S. Ocenka osobennostej spinal'nogo krovoobrashhenija, mikrocirkuljacii v obolochkah spinnogo mozga i nejrovegetativnoj reguljacii pri skoleoze // Hirurgija pozvonochnika. 2006. № 3. S. 38-48.
- Luk'janova S.N., Merkulov A.V. K voprosu o stepeni uchastija razlichnyh otdelov golovnogo mozga v reakcijah na magnitnoe i jelektromagnitnoe polja malyh urovnej// Radiacionnaja biologija. Radiojekologija. 2012. T. 52. № 6. S. 608-615.
- Denisenko Ju.P., Vysochin Ju.V. Vlijanie jelektromagnitnyh polej na funkcional'noe sostojanie central'noj nervnoj sistemy sportsmenov // Teorija i praktika fizicheskoj kul'tury. 2005. № 12. S. 3132.
- Antonov V.F., Kozlova E.K., Chernysh A.M. Fizika i biofizika: Ucheb. dlja stud. med. vuzov / Pod red. V.F. Antonova. M.: GJeOTAR-Media. 2010. 480 s.
- Orlov R.S., Nozdrachev A.D. Normal'naja fiziologija: Uchebnik. M.: GJeOTAR-Media. 2010. 832 s.
- Tejlor D., Grin N., Staut U. Biologija: V 3-h t. T.2: Per. s angl. / Pod red. R. Sopera. Izd-e 3-e. M.: Mir. 2004. 436 s.