The effect of mobile phone electromagnetic fields on the alpha rhythm of human electroencephalogram.
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Date
2007-12-24
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Abstract
Mobile phones MP emit low level electromagnetic fields that have been reported to affect neural function in humans however demonstrations of such effects have not been conclusive The purpose of the present study was to test one of the strongest findings in the literature that of increased alpha power in response to MP type radiation Healthy participants N 120 were tested using a double blind counterbalanced crossover design with each receiving a 30 min Active and a 30 min Sham Exposure 1 week apart while electroencephalogram EEG data were recorded Resting alpha power 8 12 Hz was then derived as a function of time for periods both during and following exposure Non parametric analyses were employed as data could not be normalized Previous reports of an overall alpha power enhancement during the MP exposure were confirmed relative to Sham with this effect larger at ipsilateral than contralateral sites over posterior regions No overall change to alpha power was observed following exposure cessation however there was less alpha power contralateral to the exposure source during this period relative to ipsilateral Employing a strong methodology the current findings support previous research that has reported an effect of MP exposure on EEG alpha power