The experimental research and investigation results show that the hazards of electromagnetic radiation to health are various and complicated, and the main hazards are: 1. Harm to the central nervous system. The central nervous system is very sensitive to electromagnetic radiation. After repeated low-intensity actions, the function of the central nervous system changes, and neurasthenia syndrome appears, which is mainly manifested as headache, dizziness, fatigue, memory loss, sleep disorder (insomnia, dreaminess or drowsiness) and daytime dozing. Irritability, sweating, palpitation, chest tightness, hair loss, etc. In particular, difficulty in falling asleep, weakness, hyperhidrosis and memory loss all indicate that the brain plays a dominant role in the inhibition process. Therefore, in addition to the above symptoms, the victim also showed short-term memory loss and prolonged visual motor reaction time. The poor coordination between hand and brain shows that the speed of marking numbers is slow and there are many mistakes. 2. Damage to the immune function of the body reduces the body's resistance. Animal experiments and investigations on radiation exposure of people show that the percentage of bacteria swallowed by white blood cells and the number of bacteria swallowed by human body are reduced. In addition, the antibody formation of people exposed to electromagnetic radiation for a long time is obviously inhibited. 3. The influence on cardiovascular system is affected by electromagnetic radiation. Hemodynamic disorder often occurs, and vascular permeability and tension decrease. Because the autonomic nerve regulation function is affected, people often show bradycardia symptoms, and a few show tachycardia. The victim's blood pressure fluctuates, starts to rise, then returns to normal, and finally appears hypotension; The decrease of R T wave voltage in ECG is the result of vagus nerve allergic reaction and myocardial malnutrition. p？ Q interval is prolonged and P wave is widened, which indicates that atrioventricular conduction is poor. In addition, people who are exposed to electromagnetic radiation for a long time will have cardiovascular diseases earlier, and it is easier to promote their occurrence and development. 4. Influence on the blood system Under the action of electromagnetic radiation, the peripheral blood picture may be unstable, mainly showing a downward trend and leukopenia. Erythropoiesis was inhibited and reticular erythropenia appeared. The health survey results of radar operators show that most people have leukopenia. In addition, when radio waves and radiation act on the human body at the same time, the impact on the blood system can be more obvious than a single factor. 5. Effects on reproductive system and heredity. People who have been exposed to ultrashort wave generators for a long time may have decreased function and impotence; Women have menstrual cycle disorder. Due to poor blood circulation of testis, it is very sensitive to electromagnetic radiation, and sperm production is inhibited, which affects fertility. It denatures the egg cells, destroys the ovulation process and makes women lose their fertility.
High-intensity electromagnetic radiation can produce genetic effects, causing chromosome aberration and abnormal mitosis in testis. Pregnant women receive short-wave diathermy treatment in the early stage or before pregnancy, which leads to congenital birth defects (deformed babies) in their offspring. 6. Influence on the visual system The eye tissue contains a lot of water, which is easy to absorb electromagnetic radiation power, and the blood flow of the eye is small, so the temperature of the eyeball is easy to rise under the action of electromagnetic radiation. Rising temperature is the main condition leading to cataract. The increase in temperature leads to protein condensation of the lens of the eye. Most scholars believe that the long-term effect of low-intensity microwave can accelerate the aging and opacity of lens, and may shorten the colored field of vision, prolong the dark adaptation time, and cause some visual obstacles. In addition, the long-term effect of low-intensity electromagnetic radiation will promote visual fatigue. 7. Carcinogenesis and Carcinogenesis of Electromagnetic Radiation Most experimental animals can increase the incidence of cancer after microwave treatment. Experiments by some microwave biologists show that electromagnetic radiation can promote chromosome mutation and mitosis in human body, leading to pathological proliferation of some tissues. Turn normal cells into cancer cells. The long-term exposure of the staff of an American embassy abroad to high electromagnetic radiation from microwave eavesdropping led to an increase in the white blood cell count of the staff of the embassy, and the incidence of cancer was higher than that of normal people. For example, in areas affected by high-power long-range microwave radar, after investigation, the number of local cancer patients has increased dramatically. The heating effect of microwave on human tissues can be used not only for physical therapy, but also for treating cancer, increasing the central temperature of cancer tissues and destroying the proliferation of cancer cells.
In addition to the above health hazards, electromagnetic radiation also has adverse effects on endocrine system, hearing, substance metabolism and morphological changes of tissues and organs.
[(This article is taken from Environmental Physics and Environmental Medicine in the Basic Series of Environmental Science published by sci-tech books)]