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The study was designed to provide a methodologically rigorous test of the hypothesis that mobile phone-exposure increases alpha wave power in the EEG, by employing similar methodologies to Curcio et al. (publication 12357 ), but with a substantially larger sample size.
120 subjects were tested in awake resting position.
Participants attended two sessions one week apart with a double blind, counterbalanced (left vs. right hemisphere exposure, between subjects), crossover (sham vs. active) design.
|ばく露時間||continuous for 30 min|
|Pulse width||576 µs|
|Duty cycle||12.5 %|
|Repetition frequency||217 Hz|
|チャンバの詳細||The participants were seated in a comfortable chair, 1.5 m in front of a computer monitor.|
|ばく露装置の詳細||The phone was placed in a cradle over the EEG recording cap, over the right or left temporal region (each for half the subjects), comparable to normal use (in "touch" position according to FCC Guidelines, 2001).|
|Sham exposure||A sham exposure was conducted.|
|Additional information||The handset's audio circuitry was disabled, and padding was placed between the handset and its leather casing to avoid acoustic and thermal cues. The used type of EEG recording cap did not display any EMF pickup within the physiologically important range relevant to this study (0.5-45 Hz) [Wood et al., 2003].|
The study has replicated previous data of mobile phone-related increases in resting alpha wave, and thus adds strength to the argument at which there are mobile phone-related bioeffects at the low levels that mobile phones operate.
Although the functional significance of this alpha wave change cannot be determined at present, it should be pointed out that alpha wave changes of the magnitude reported in this investigation have not been found to relate to health outcomes, either positive or negative.