What are EMFs?
electrical wiring, and appliances all produce electric and magnetic fields. EMFs
are invisible lines of force that surround any electrical device. Electrical and
magnetic fields have different properties and possibly different ways of causing
biological effects. Note that while electric fields are easily shielded or
weakened by conducting objects (e.g., trees, buildings, and human skin),
magnetic fields weaken with increasing distance from the source.
Even though electric and magnetic
fields are present around appliances and power lines, more recent interest and
research have focused on potential health effects of magnetic fields. This is
because epidemiological studies have found associations between increased cancer
risk and power-line configurations which are thought to be surrogates for
magnetic fields. No such associations have been found with measured electric
Effects shown for electromagnetic radiation
radio and radar signals):
signals have been shown to:
- Alter brain activity,
including EEG and reaction times, memory loss, headaches, fatigue and
concentration problems, dizziness (the Microwave Syndrome), Gordon (1966),
Deroche (1971), Moscovici et al. (1974), Lilienfeld et al. (1978), Shandala
et al. (1979), Forman et al. (1982), Frey (1998).
- Impair sleep and learning,
Altpeter et al. (1995), Kolodynski and Kolodynska (1996)
- Increase permeability of the
blood brain barrier (a mechanism for headache), Frey et al. (1975), Alberts
(1977, 1978) and Oscar and Hawkins (1977).
- Highly significant Increased
permeability of the blood brain barrier for 915 MHz radiation at SAR
=0.016-0.1 (p=0.015) and SAR = 0.1-0.4 (p=0.002); Salford et al. (1994).
- Alter GABA, Kolomytkin et al.
- Increase neurodegenerative
disease including Alzheimer's Disease, Sobel et al. (1995, 1996), Savitz et
- Alter blood pressure and heart
rhythm (heart rate variability) and Heart Disease, Forman et al. (1986),
Hamburger, Logue and Silverman (1983), Bortkiewicz et al. (1995, 1996, 1997)
and Szmigielski at al (1998), Savitz et al. (1999)
- Increase the Suicide Risk,
Baris and Armstrong (1990), Perry et al. (1991), Van Wijngaarden et al.
- Impair the immune system Quan
et al. (1992), Dmoch and Moszczynski (1998), Bruvere et al. (1998)
- Reduce sperm counts,
Weyandt et al. (1996)
- Increase miscarriage and
congenital abnormalities, Kallen et al. (1982), Larsen et al. (1991),
Ouellet-Hellstrom and Stewart (1993). Ouellet-Hellstrom and Stewart found a
a significant dose-response, p<0.005.
EMFs and Cancer
What happens if I'm exposed to EMFs?
Microshield's web site