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The Affect of Low-frequency Radiation to the Study Ability and Memory Capacity of Rats

Author: TianYongHao
Tutor: LiuXiangMing
School: Central South University for Nationalities
Course: Biomedical Engineering
Keywords: low-frequency electromagnetic radiation ability and memory capacity eight-arm maze
CLC: Q42
Type: Master's thesis
Year: 2011
Downloads: 52
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Abstract

As the technology of electromagnetic wave is widely used in telecommunications, medical and military fields, the increasingly serious pollution of electromagnetic radiation hazards imperil human beings’living environment, which gradually arouses a widely concern about the biological effects of electromagnetic radiation for people. Research indicates that high-frequency electromagnetic radiation will produce thermal effects, push the body temperature higher and bring a range of health problems. Both Epidemiological data and animal experiments have shown that high-intensity electromagnetic radiation has an obvious damage effect on central nervous system [3, 4]. However, the current term for the low-power microwave radiation on the central nervous system are still lack of the in-depth study, and the impact of the low-frequency electromagnetic radiation has been divergent all the time, especially on the animal ability of learning and memorizing that has always been a highly controversial topic on the scientific community.To solve this problem, we designed a series of behavioral experiments to examine whether the low-frequency radiation response would affect the ability and memory capacity of rats, and further investigate what kind of influences are imposed on the rats’ability of stress adaptating and long-term memory capacity. The experiment was divided into two parts: Firstly, we identify whether the low-frequency radiation would affect the stress adaptating through thermal radiation, hot plate, tail immersion test and a series of experiments. Besides, we also designed an eight-arm maze test to detect whether the ability of memorizing has obvious changes for the radiation group rats which sustained a long-term electromagnetic radiation with a power density of 10mW / cm2 , compared with the false radiation or control group rats which were subjected to the same conditions with the power density of 0.The results demonstrated that the short-term continuous radiation on mice would significantly reduce its sensitivity of pain, namely, the continuous low-frequency radiation would impose a significant impact on the central nervous system of animals. According to these excitability experimental results, we can design some other experiments to study whether the other suitable electromagnetic radiation would affect the peripheral nerves in vitro and further clarify the location and extent of impact to the central nervous system.In addition, eight-arm maze test also found that rats that received the long-term low-frequency radiation acted more slowly, the experimental time-consuming increased and the reference memory error and working memory error in a single experiment were significantly increased. All the results showed that they had a significant decline in memory, and its rate of decline was greater than that of the normal control group whose rate of decline was changing with time, and the more noteworthy was that in the experiment the numbers of the consecutive correct between the rats that received the long-term low-frequency radiation and those not received were not significantly different. This phenomenon showed that low-frequency electromagnetic radiation caused the noticeable drop in the memory of animals and slower response, but it had no significant influence on the formed deep memory. Therefore, this phenomenon also led to the exploration and discussion of the deep-seated memories of animals.In conclusion, the above results are confirmed that either long or short-term low-frequency electromagnetic radiation has a certain impact on the life of learning and memory ability of the body. We need to continue to study the molecular biological mechanisms of the impact, and thus deplore the fundamental understanding of low-frequency radiation that has an impact on the mechanism of our memory system. Moreover, we should also appropriately avoid excessive exposure to radiation field in our daily life, which puts into a higher level in technology and much more challenges for the contemporary growing communication industry.

The Affect of Low-frequency Radiation to the Study Ability and Memory Capacity of Rats

Abstract

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