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.
Frequency | 902.4 MHz |
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Type | |
Exposure duration | continuous for 45 min |
Exposure source |
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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.
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