Effects of pulsed and continuous wave 902 MHz mobile phone exposure on brain oscillatory activity during cognitive processing.
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Date
2007-04-30
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Abstract
The aim of the current double blind studies was to partially replicate the studies by Krause et al 2000ab 2004 and to further investigate the possible effects of electromagnetic fields EMF emitted by mobile phones MP on the event related desynchronisation synchronisation ERD ERS EEG electroencephalogram responses during cognitive processing Two groups both consisting of 36 male participants were recruited One group performed an auditory memory task and the other performed a visual working memory task in six exposure conditions SHAM no EMF CW continuous wave EMF and PM pulse modulated EMF during both left and right side exposure while the EEG was recorded In line with our previous studies we observed that the exposure to EMF had modest effects on brain oscillatory responses in the alpha frequency range approximately 8 12 Hz and had no effects on the behavioural measures The effects on the EEG were however varying unsystematic and inconsistent with previous reports We conclude that the effects of EMF on brain oscillatory responses may be subtle variable and difficult to replicate for unknown reasons