Ãâó: ±¹Á¦»ý¸í°øÇÐ ¿¬±¸¿ø ³í¹®ÀÚ·á (2003³â 7¿ù)
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Effects of high-frequency
electromagnetic fields on human EEG: a brain mapping study.[RU1]
( https://www.ncbi.nlm.nih.gov/pubmed/12881192)
Cell phones emitting pulsed
high-frequency electromagnetic fields (EMF) may affect the human brain, but
there are inconsistent results concerning their effects on electroencephalogram
(EEG).[RU1] We
used a 16-channel telemetric electroencephalograph (ExpertTM), to record EEG
changes during exposure of human skull to EMF emitted by a mobile phone.
Spatial distribution of EMF was especially concentrated around the ipsilateral
eye adjacent to the basal surface of the brain. Traditional EEG was full of
noises during operation of a cellular phone. Using a telemetric
electroencephalograph (ExpertTM) in awake subjects, all the noise was
eliminated, and EEG showed interesting changes: after a period of 10-15 s there
was no visible change, the spectrum median frequency increased in areas close
to antenna; after 20-40 s, a slow-wave activity (2.5-6.0 Hz) appeared in the
contralateral frontal and temporal areas. These slow waves lasting for about
one second repeated every 15-20 s at the same recording electrodes. After
turning off the mobile phone, slow-wave activity progressively disappeared;
local changes such as increased median frequency decreased and disappeared
after 15-20 min. We
observed similar changes in children, but the slow-waves with higher amplitude
appeared earlier in children (10-20 s) than adults, and their frequency was
lower (1.0-2.5 Hz) with longer duration and shorter intervals. The results
suggested that cellular phones may reversibly influence the human brain,
inducing abnormal slow waves in EEG of awake persons.[RU2]
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