somatic effects
Physical effects can be divided into thermal effects and non-thermal effects. The mechanism of thermal effect has been clearly understood. After the human body receives electromagnetic radiation, the water molecules in the body will move rapidly with the change of electromagnetic field direction, which will heat the body. If a lot of radiation energy is absorbed, it is too late to dissipate the absorbed heat by adjusting the body temperature, which will cause the body temperature to rise, which will lead to various problems.
A symptom.
The mechanism of non-thermal effect is not fully understood, but there is an effect: the absorbed radiation energy is not enough to cause the body temperature to rise, but biological changes or reactions do occur. This effect includes neurasthenia syndrome. It is reported that electromagnetic radiation can also cause cancer.
Quorum sensing
Group effect cannot be observed in a short time. It may make human beings smarter, but it may also affect human development in turn.
The influence of electromagnetic field on human body should have different consequences because of the different frequency of electromagnetic field.
Influence of power frequency electromagnetic field
Influence of power frequency electromagnetic field on central nervous system
For a long time, scholars in different countries have different views on whether the power frequency electromagnetic field affects the central nervous system. Many occupational hygiene investigation reports of high-voltage and ultra-high-voltage transmission lines and substations at home and abroad point out that neurasthenia and memory loss are the most common symptoms of workers exposed to power frequency electromagnetic fields, but there is a lack of objective inspection results. At present, it is believed that the influence of power frequency electromagnetic field on the central nervous system is mainly caused by electric field, which can be proved in animal experiments.
Relationship between power frequency electromagnetic field and tumorigenesis
Many investigations have found that although occupational exposure to electromagnetic fields may increase the risk of cancer, especially leukemia, lymphoid tumors and nervous system tumors, the risk is not high and there is no statistical significance. However, it should be pointed out that if there are other strong carcinogenic factors in the production environment, the role of power frequency electromagnetic field can not be ignored.
Effect of power frequency electromagnetic field on reproduction
Statistics show that only the use of electric blankets in the first trimester is related to the increase in the incidence of abortion. However, the incidence of abortion by using electric blanket in the second trimester of pregnancy decreased. In foreign countries, Nordstrom and others reported for the first time that a retrospective survey of 542 power plant workers found that the proportion of children suffering from congenital malformation increased when their fathers worked in the high-voltage dispatching room. Due to the small number of cases, the conclusion is still uncertain.
Influence of radio frequency electromagnetic field
Effects on nervous system
After exposure to high-frequency electromagnetic field radiation, the olfactory threshold increases and the dark adaptation event is prolonged in advance. It is reported that long-term exposure to high-intensity radio-frequency electromagnetic radiation may cause some changes in EEG.
Effects on cardiovascular system
Long-term exposure to high-frequency electromagnetic fields has a high incidence of hypotension or hypotension.
Effect on endocrine system
Hygienic investigation was carried out on 60 female workers exposed to high-field and high-frequency medium heating in a plastic factory in Shanghai. It was found that the lactation symptoms of female workers who were not breastfed increased obviously, and the menstrual cycle increased obviously. It is mainly caused by the confusion of nerves and body fluids.
Influence of microwave electromagnetic field
Acute microwave radiation injury
When excessive microwave radiation is radiated to human body, it may cause acute damage to some tissues and organs. Acute microwave injury generally manifests as headache, nausea, dizziness, insomnia all night and local burning sensation caused by radiation. Generally, after a few days, weeks or longer rest, the symptoms can generally disappear.
Chronic microwave radiation syndrome
Long-term exposure to low-intensity microwave radiation can cause some manifestations of chronic microwave radiation syndrome, which are generally confusion of some physiological functions and fluctuation of some biochemical indexes.