تغییرات دمای عمق های مختلف بافت مغز در مواجهه با امواج رادیوفرکانسی تلفن همراه

نویسندگان

دانشگاه علوم پزشکی اصفهان

چکیده

مقدمه: استفاده شایع از تلفن های همراه منجر به افزایش نگرانی در مورد تأثیر امواج رادیوفرکانسی بر فیریولوژی بدن انسان شده است. این مطالعه به منظور تعیین واکنش متفاوت دمای عمق های مختلف بافت مغز در مواجهه با امواج رادیوفرکانسی تلفن همراه انجام شد.
روش اجرا: این مطالعه از نوع تجربی بود. بافت مغز گاو در یک اتاقک در سه عمق  mm12،22و2 بافت و در فاصله ی و cm 4 وmm 4 تلفن همراه از بافت به مدت min 15 اثر حرارتی امواج رادیوفرکانسی تلفن همراه در حین مواجهه و بعد از قطع مواجهه مورد بررسی قرار گرفت. برای اندازه گیری دمای بافت از دماسنج لوترون استفاده گردید.
یافته ها: در حین مواجهه بافت مغز در فاصله mm4 از تلفن همراه میزان افزایش دما در عمق mm22بیشتر از عمق های mm 2و 12 بود به طوری که دمای بافت در عمق های  mm12،22و2 به ترتیب  29، 31/0 و 37/0 درجه  سانتی گراد نسبت به دمای پایه  افزایش یافت. همچنین دمای بافت مغز در فاصله cm4 با افزایش عمق بافت، بیشتر از سایر عمق ها بود. افزایش دمای بافت با افزایش عمق بافت مغز در زمان بعد از مواجهه با تلفن همراه نیز وجود داشت. دمای عمق  mm22 بافت در زمان مواجهه با سرعت بالاتری افزایش یافت.
نتیجه گیری: امواج رادیوفرکانسی تلفن همراه نه تنها در تمامی عمق های بافت مغز سبب افزایش دمای بافت شد بلکه در عمق های بالاتر(mm 22(  بافت مغز دمای ناشی از امواج رادیوفرکانسی تلفن همراه بیشتر بود.

کلیدواژه‌ها


عنوان مقاله [English]

Different reactions of different magnetic temperatures of brain tissue in the face of mobile radiofrequency waves

نویسندگان [English]

  • farhad forouharmajd
  • siamak pourabdian
  • Hossein Ebrahimi
چکیده [English]

Background: The widespread use of cell phones has led to an increase in concern about the effect of radiofrequency radiation on the physiology of the human body. This study was conducted to determine the different reaction temperatures of different brain tissue in exposure to mobile radiofrequency waves.
Method: This was an experimental study. The cow's brain tissue was examined in a chamber at three depths of 2,12 and 22 mm and at a distance of 4 mm and 4 in the cell phone from the tissue for 15 min of the radiofrequency radiation of the mobile phone during exposure and after the exposure was discontinued. . Luteron thermometer was used to measure tissue temperature.
Results: During the exposure to the brain tissue at a distance of 4 mm from the mobile phone, the temperature increase at 22 mm depth was more than the depths of 2 and 12 mm, so that the tissue temperature at 2, 12 and 22 mm depths was 29 ° C 0 /, 0.3 / 0 and 0/37 respectively. Also, the temperature of the brain tissue at 4 cm intervals was greater than the other depths with increasing tissue depth. An increase in tissue temperature was also associated with increased brain tissue depth after exposure to mobile phones. The temperature of the depth of 22 mm of texture increased during exposure to higher temperatures.
 Conclusion: Mobile radiofrequency waves not only increased the temperature of the tissue at all depths of the brain but at higher depths (22 mm), brain tissue was higher than the temperature of mobile radiofrequency waves.

کلیدواژه‌ها [English]

  • cell phone
  • radiofrequency waves
  • brain tissue
  • Temperature
  • tissue depth
[1] Khadrawy Y, Ahmed NA, Ezz HSA, Radwan N. Effect of electromagnetic radiation from mobile phone on the levels of cortical amino acid neurotransmitters in adult and young rats. Romanian J Biophys. 2009;19(4):295-305. [2]. Anguera J, Andújar A, Huynh M-C, Orlenius C, Picher C, Puente C. Advances in antenna technology for wireless handheld devices. International Journal of Antennas and Propagation. 2013;2013:1-25. [3]. Khurana VG, Teo C, Kundi M, Hardell L, Carlberg M. Cell phones and brain tumors: a review including the long-term epidemiologic data. Surgical neurology. 2009;72(3):205-14. [4]. Lahiri B, Bagavathiappan S, Soumya C, Jayakumar T, Philip J. Infrared thermography based studies on mobile phone induced heating. Infrared Physics & Technology. 2015;71:242-51. [5]. Develi I, Sorgucu U. Prediction of temperature distribution in human BEL exposed to 900MHz mobile phone radiation using ANFIS. Applied Soft Computing. 2015;37:1029-36. [6]. Lindholm H, Alanko T, Rintamäki H, Kännälä S, Toivonen T, Sistonen H, et al. Thermal effects of mobile phone RF fields on children: a provocation study. Progress in biophysics and molecular biology. 2011;107(3):399-403. [7]. Khalatbari S, Sardari D, Mirzaee AA, Sadafi HA. Calculating SAR in two models of the human head exposed to mobile phones radiations at 900 and 1800 MHz. PIERS Online. 2006;2(1):104-9. [8]. Golmohammadi R, Kamalini M, Abed K, Karim S, Eshagh M. Investigating the Electromagnetic Fields of Common Cell Phones and Self-reported Symptoms of Users. Journal of Ergonomics. 2014;2(1):1-7. [9]. Perrin A, Cretallaz C, Collin A, Amourette C, Yardin C. Effects of radiofrequency field on the blood-brain barrier: A systematic review from 2005 to 2009. Comptes Rendus Physique. 2010;11(9-10):602-12. [10]. Rusnani A, Norsuzila N, editors. Measurement and analysis of temperature rise caused by handheld mobile telephones using infrared thermal imaging. RF and Microwave Conference, 2008 RFM 2008 IEEE International; 2008: IEEE. [11]. Isa R, Pasya I, Taib M, Jahidin A, Omar W, Fuad N, et al. Classification of brainwave asymmetry influenced by mobile phone radiofrequency emission. Procedia-Social and Behavioral Sciences. 2013;97:538-45. [12]. Anderson V, Rowley J. Measurements of skin surface temperature during mobile phone use. Bioelectromagnetics. 2007;28(2):159. [13]. Wessapan T, Srisawatdhisukul S, Rattanadecho P. Specific absorption rate and temperature distributions in human head subjected to mobile phone radiation at different frequencies. International Journal of Heat and Mass Transfer. 2012;55(1):347-59. [14]. Martens L. Electromagnetic safety of children using wireless phones: a literature review. Bioelectromagnetics. 2005;26(S7):S133-S7. [15]. Alaei P. Introduction to health physics. Medical Physics. 2008;35(12):5959. [16]. Beason RC, Semm P. Responses of neurons to an amplitude modulated microwave stimulus. Neuroscience Letters. 2002;333(3):175-8. [17]. Hocking B, Westerman R. Neurological effects of radiofrequency radiation. Occupational Medicine. 2003;53(2):123-7. [18]. Mortazavi SMJ, Atefi M. The ability of GSM mobile phone users in detecting exposure to electromagnetic fields and the bioeffects of these fields on their vital signs. Journal of Kerman University of Medical Sciences. 2015. [19]. Kesari KK, Siddiqui M, Meena R, Verma H, Kumar S. Cell phone radiation exposure on brain and associated biological systems. Indian J Exp Biol 2013;51(3):187-200. [20]. Li H-J, Peng R-Y, Wang C-Z, Qiao S-M, Yong Z, Gao Y-B, et al. Alterations of cognitive function and 5-HT system in rats after long term microwave exposure. Physiology & behavior. 2015;140:236-46. [21]. Papageorgiou CC, Nanou ED, Tsiafakis VG, Kapareliotis E, Kontoangelos KA, Capsalis CN, et al. Acute mobile phone effects on pre-attentive operation. Neuroscience Letters. 2006;397(1):99-103. [22]. Koivisto M, Krause CM, Revonsuo A, Laine M, Hääläinen H. The effects of electromagnetic field emitted by GSM phones on working memory. Neuroreport. 2000;11(8):1641-3. [23]. Saikhedkar N, Bhatnagar M, Jain A, Sukhwal P, Sharma C, Jaiswal N. Effects of mobile phone radiation (900 MHz radiofrequency) on structure and functions of rat brain. Neurological research. 2014;36(12):1072-9. [24]. Ezz HA, Khadrawy Y, Ahmed N, Radwan N, El Bakry M. The effect of pulsed electromagnetic radiation from mobile phone on the levels of monoamine neurotransmitters in four different areas of rat brain. Eur Rev Med Pharmacol Sci. 2013;17(13):1782-8. [25]. Hossain M, Faruque MRI, Islam MT. Analysis on the effect of the distances and inclination angles between human head and mobile phone on SAR. Progress in biophysics and molecular biology. 2015;119(2):103-10. [26]. Kivekas O, Ollikainen J, Lehtiniemi T, Vainikainen P. Bandwidth, SAR, and efficiency of internal mobile phone antennas. IEEE Transactions on Electromagnetic compatibility. 2004;46(1):71-86. [27]. Hirata A, Sugiyama H, Fujiwara O. Estimation of core temperature elevation in humans and animals for whole-body averaged SAR. Progress In Electromagnetics Research. 2009;99:53-70.