Mental health status of employees in substations of electromagnetic fields at extremely low frequency in tehran
Today with the industrialization of communities, electromagnetic fields have much more intensively entered to human life and work place. Increasing number of these fields may account for studying the potential development of biological system impairments much more robustly than before. The impacts of unwanted exposures to such fields have been addressed in the literature, but studying on the effects of long-term and protected exposure have recently been considered. However, existing data especially in human studies are rare. Clinical experiments in all over the world have shown that different physiological processes including fertility, insemination, equilibrium of neuroendocrine and some cardio-respiratory systems may be affected by this environmental factor and lead to different abnormalities (Golestani Daryani, 1993). Nordstrom reported that the children whose fathers had been working in electromagnetic field stations had considerable congenital malformations comparing to the control group (Nordstrom et al, 1989). The risk for the development of Alzheimer’s disease among workers in medium to high electromagnetic field exposures was reported high (Sobel et al, 1996). According to a study conducted on workers in 400 to 500 kV areas, neurasthenia, mild headache, fatigue, tremor, irregular heart rate, and fluctuations of blood pressure have been reported (Ghiasseddin, 1996). An investigation on rats showed altered operant behavior of adult rats after perinatal expousure to a 60-Hz. Adult rats that were exposed perinatally to a 60-Hz electromagnetic fields, 22 days in uterus and the first 8 days postpartum for 20 hours a day, responded at significantly lower rates than did the controls in operant conditioning, experimental extinction, suspension of conditioning, and reconditioning (Slazenger et al, 1990).