Do you want to serve yourself up some” fried glucose” in your brain? Just use your cell phone for 50 minutes at a time while holding it against your ear. The brain glucose metabolism in the region closest to the phone’s antenna is effected.
What is glucose? Glucose, blood sugar, the major energy source for brain energy enters the brain from the arterial side and is absorbed by astrocytes, which then transform glucose to lactate. Lactate exchange occurs with neurons, which oxidize it to CO2 and H2O drained by the venous blood. The increase in lactate levels and the uncoupling between oxygen consumption and glucose uptake revealed by PET at the early stages of activation, cause lactate fluxes between astrocytes and neurons.
When you hold a cell phone to your ear in an on position for 50 minutes or more it changes the way glucose moves through the brain cells. The area begins to heat only after 5 minutes and changes the biochemistry as proven by PET scans.
During cell phone use in the on and then off positions and found that although whole-brain metabolism was not affected, metabolism was increased in the orbitofrontal cortex and the temporal pole areas of the brain while the cell phone was on, areas that are close to where phone’s antenna meets the head.(brain energy metabolism).
Blood-borne glucose is the brain’s fuel and is needed to supply the moment-to-moment changes in energy demand during information processing, the local rates of blood flow and glucose utilization are closely linked to the activities of brain cells. Because the blood-brain barrier restricts transfer of material from blood into brain, many compounds that are readily metabolized by cultured brain cells or brain slices, including lactate, cannot be transported into adult brain in vivo in sufficient quantities to compensate for inadequate levels of glucose and support the brain’s high and continuous energy demand.
Nora D. Volkow, MD, from the National Institute on Drug Abuse in Bethesda, Maryland Hands-free devices or speaker-phone mode should be used to avoid direct contact of the telephone with the head. Previous work suggests that if the phone is a foot or more away it is very unlikely to have any effects, she said.
Caution may be particularly necessary for children and adolescents whose neural tissue is still developing, Dr. Volkow noted.
Other studies have shown that the effects of radio frequency-modulated electromagnetic fields (RF-EMFs), particularly carcinogenic effects show some relationship between cell phones and the risk of brain tumor development.
Dr. Volkow’s studies over the past 15 years have shown:
- the the brain’s function is affected by brain imaging technologies, including PET and magnetic resonance imaging (MRI) these magnetic fields affect brain glucose metabolism,
- static magnetic field of a 4-T MRI does not affect brain metabolism
- when magnetic fields were changed rapidly, which produces electrical currents, there was a significant increase in glucose metabolism in the brain. They wondered whether the RF-EMFs produced by cell phones might do the same thing.
metabolism in the regions closest to the antenna, the orbitofrontal cortex (the thinking and decision-making area of the brain) and temporal pole (part of the temporal lobe). The temporal lobe is involved in auditory perception and is home to the primary auditory cortex. It is also important for the processing of semantics in both speech and vision. The temporal lobe contains the hippocampus and plays a key role in the formation of long-term memory. was significantly higher when the cell phone was on.
Henry Lai, PhD, from the Department of Bioengineering at the University of Washington, Seattle, and Lennart Hardell, MD, PhD, from the Department of Oncology at University Hospital, Orebro, Sweden, point out that this is the first investigation in humans of glucose metabolism in the brain after cell phone use.
”The results by Volkow et al add to the concern about possible acute and long-term health effects of radiofrequency emissions from wireless phones, including both mobile and cordless desktop phones,” they write.
”Although the biological significance, if any, of increased glucose metabolism from acute cell phone exposure is unknown, the results warrant further investigation.
The effects are unlikely to be mediated by the substantial increase in temperature seen with cell phones given the activation was “quite distant” from where the cell phone made contact, they speculate. Further, since the subjects were only listening rather than talking on the phone, “the effect observed could thus potentially be more pronounced in normal-use situations.”
Another major concern is the effects of unmonitored cell phone towers that spider web across the US each one producing many thousands of times higher EMF’s radiation than a cell phone.
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