Effects of electromagnetic waves on human brain
January 18, 2014
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The effect of mobile electromagnetic radiation on human health is the subject of new interest and study. Mobile or cellular phones are now an essential part of modern telecommunications. Radiation is energy and we are being exposed to radiation from numeral sources. It occurs when unstable nuclei of atoms decay and release particles.With the use of astonishing increase in mobiles phones research findings provide at least some information concerning how specific types may sway biological tissue, including that of the brain. However, the sharp cell phone exposure affects the human brain is unclear. As human brain is very sensitive so these waves may affects brain function in humans.
Researchers typically differentiate between the effects of ionizing radiation (such as far-ultraviolet, X-ray and gamma ray) and non-ionizing radiation (including visible light, microwave and radio). The ionizing variety may be undesirable because it can cause DNA damage and mutations, thus we should all limit our exposure to its sources-radioactive materials and solar radiation among them. However, given modern technology, non-ionizing radiation from power lines, personal wireless devices, cell phone towers and other sources is practically unavoidable. Extremely low frequency electromagnetic fields (EMF) surround home appliances as well as high-voltage electrical transmission lines and transformers.
When talking on a cell phone, a transmitter takes the sound of your voice and encodes it onto a continuous sine wave. These waves radiates out from the antenna and fluctuates evenly through space. Sine waves are measured in terms of frequency. Once the encoded sound has been placed on the sine wave, the transmitter sends the signal to the antenna, which then sends the signal out. While talking on a cell phone, most users put the phone alongside the head. In this position, there is a more chance that some of the radiation will be immersed by human tissue.
In a controlled experiment, researchers exposed the right ear of 18 participants to LTE cell phone radiation for 30 minutes. The oscillatory frequencies may match up the neuronal tissues or activity. The temperature changes produced by cell phones also affect neuronal activity but the effect of these radiations are in smallest amount. It is a saga that wired hands-free kits increase exposure by acting as a route for the radio waves to travel along.
Studies of these waves have investigated the effects of radiofrequency fields on cognitive function, heart rate brain electrical activity, sleep, and blood pressure in volunteers. Epidemiological research examining future long-term risks from radiofrequency exposure has mostly looked for an involvement between brain tumours and mobile phone use. However, because many cancers are not detectable until many years after the interactions that led to the tumour, and since mobile phones were not widely used until the early 1990s. A person using a mobile phone 30-40 cm away from their body - for example when text messaging, accessing the Internet, or using a "hands free" device - will therefore have a much lower exposure to radiofrequency fields than someone holding the handset against their head. In addition exposure can also be reduced by limiting the number and length of calls. Using the phone in areas of good reception also decreases exposure as it allows the phone to transmit at reduced power. The use of commercial devices for reducing radiofrequency field exposure has not been shown to be effective. The range of ' shielding' devices currently available includes stick-on deflective holographic or ceramic absorbing disks, passive electronic chips, metallic fiber patches, antenna clips, phone covers containing passive antennas and foil-lined cases and pouches. Studies have shown that these products generally do not work as advertised.
Handsets and base stations are also designed to reduce power automatically to the lowest possible level to maintain a good quality connection. In many countries today, cell phone towers has been banned from school sites for good reason. AT&T will begin selling the previously announced Filip cell phone/GPS-locator watch for kids at $199 beginning November 22 through the carrier's web store and its flagship Michigan Avenue store on Chicago. A growing number of researchers have already begun figuring out how to reduce radiation levels. Scientist are working to drive to research to better treatments and ultimately a cure as quickly as possible.
