To study the hypothesis that electromagnetic fields from mobile phones affect inter-hemispheric synchronization of cerebral rhythms, an important physiological feature of information transfer into the brain.
10 in healthy subjects in awake resting conditions underwent two EEG recordings, separated by 1 week. Individual EEG rhythms of interest were delta waves (about 2-4 Hz), theta waves (about 4-6 Hz), alpha wave 1 (about 6-8 Hz), alpha wave 2 (about 8-10 Hz) and alpha wave 3 (about 10-12 Hz).
Functional coupling of cerebral rhythms roughly reflects operative binding between coupled brain regions and relative information transfer. Linear components of that coupling are modelled by the inter-hemispheric spectral coherence of EEG rhythms.
|Exposure duration||continuous for 45 min|
|Distance between exposed object and exposure source||4 cm|
|Setup||The mobile phone was held by a modified helmet in the normal use position, 1.5 cm from the subject's left ear, with the antenna about 4 cm from the head in the parietotemporal area. A similar phone without battery was placed on the other side of the helmet in order to balance the weight and conceal the exposure side.|
|Sham exposure||A sham exposure was conducted.|
|Additional info||For sham exposure in one of the two sessions, both phones were without battery.|
The data revealed that, compared to sham exposure, GSM stimulation modulated the inter-hemispheric coupling of frontal and temporal alpha wave rhythms.
The results indicate that prolonged mobile phone emission affects brain physiology, probably by the inter-hemispheric synchronization of signals.