Biological effects of electromagnetic fields

A growing number of technical applications generate electromagnetic fields at various frequencies and powers. Their effects on living media are still not very well known although they have been investigated by scientists for 30 years. Studies on the subject are concerned with cellular modifications created by electromagnetic fields and with the influence of electromagnetic fields on the nervous system. The arrival on the market of mobile phones, which create non-negligible fields near the brain, is putting back the problem of pulsed amplitude modulated fields. Many investigations have underlined threshold mechanisms (under which no phenomenon is observed), memory mechanisms (effects exist after solicitation), and accumulation mechanisms (under repeated solicitations).