Vol.2, No 4, 2004 pp. 311 - 316
UDC 537.868

EXPOSURE TO ELECTROMAGNETIC FIELD
BY USING MOBILE TELEPHONES
AND ITS INFLUENCE ON THE BRAIN FUNCTIONS
Boris Đinđić1, Stojan Radić1, Dejan Krstić2, Dušan Sokolović1,
 Dejan Petković2, Tomislav Pavlović3, Jasmina Radosavljević2
1Faculty of Medicine, University of Niš, 18000 Niš
2University of Niš, Faculty of Occupational Safety,
Department of Environmental Protection, Čarnojevića 10 A, Niš
3University of Niš, Faculty of Sciences and Mathematics, Višegradska 33, Niš

Abstract. The widespread use of cellular telephones in recent years inevitably raises the question of the effects on brain function of the electromagnetic fields (EMF) emitted by such telephones.
 The aim of this work was to investigate the changes in the experimental behaviour of the animalsr under the conditions of long-term mobile phones electromagnetic field exposition.
 We used 4 weeks old, 20 BALB/c mice, divided into two groups: experimental -consisting of 4 female and 4 male animals and control consisting of 8 female and 4 male animals. The experimental group was for two months continually exposed to 900 MHz EMF to mobile phones. In addition to stand-by exposure every-day in different time 30 minutes of telephone using was simulated. The individual, collective behavior and body mass was observed. The experimental group was exposed to EMF during 2 months and observed for another month.
 The animals in experimental group exposed to EMF showed less weight gain (p<0.05), after two months, meanwhile the amount of used food was similar in both groups. The most important observations were changing of basic behavior models and collective defence reflexes as well as aggressive behavior. The experimental animals exposed to EMF did not show spatial organization of their living space onto clutch and feeding places. After removing the source of EMF, this change in behavior disappears after few weeks.
 The currently available results suggest that some aspects of cognitive function and some direct measures of brain and body physiology may be affected by exposure to electromagnetic fields of the type emitted by mobile telephones.
Key Words: Brain Functions, Behavior, Microwave Radiation, Mobile Telephones

UTICAJ ELEKTROMAGNETNOG POLJA MOBILNIH TELEFONA NA MOŽDANE FUNKCIJE
Masovna upotreba mobilnih telefona poslednjih godina nametnula je pitanje njihovog štetnog delovanja na ljudsko zdravlje sa posebnim osvrtom na njihovo delovanje na moždane funkcije.
Cilj ovog rada je ispitivanje promena ponašanja eksperimentalnih životinja u uslovima dugotrajne ekspozicije elektromagnetnom polju karakteristika kao kod mobilne telefonije.
Za eksperiment su korišćeni BALB/c miševi, stari 4 nedelje. Oni su podeljeni u dve grupe: eksperimentalnu (4 ženke i 4 mužjaka) i kontrolnu grupu (8 ženki i 4 mužjaka). Eksperimentalna grupa je dva meseca kontinuirano bila izložena elektromagnetnom polju (EMP) od 900 MHz poreklom od mobilnog telefona. Pored bazične ekspozicije svakodnevno je simulirano 30 minuta upotrebe mobilnog telefona. Posmatrane su promene ponašanja kako individualnog tako i kolektivnog ponašanja, kao i promene telesne težine. Eksperimentalna grupa je bila eksponirana EMP tokom 2 meseca, a zatim praćena sledećih mesec dana.
Životinje iz eksperimentalne grupe izložene dejstvu EMP pokazuju slabiji prirast u telesnoj masi (p<0.05), iako je količina upotrebljene hrane bila ista u obe grupe. Najvažnija opservacija je promena osnovnih modela ponašanja i kolektivnog odbrambenog refleksa uz prisutnu povećanu agresivnost. Eksperimentalne životinje izložene EMP nisu pokazivale prostornu organizaciju životnog prostora na leglo i mesto za hranjenje. Sve ove promene su tokom nekoliko nedelja nestale nakon uklanjanja izvora EMP.
Navedeni rezultati ukazuju da neke kognitivne i moždane funkcije kao i fiziološki procesi u organizmu mogu biti poremećeni usled ekspozicije EMP karakteristika sličnih onima koji se koriste u mobilnoj telefoniji.
Ključne reči: funkcije mozga, ponašanje, mikrotalasno elektromagnetno zračenje, mobilni telefoni