A simulated mobile phone made of two Perspex plates and with a metal sheet sandwiched between the plates to act as a ground plane was driven by an external source connected through coaxial cable. The antenna was an 8.7 cm long steel wire in the form of sleeved monopole, at the base of which was an 0.25 λ open circuit coaxial stub formed from braid. The phone was clamped to the left ear by means of a modified ear defender and orientated in a normal position for use with the antenna adjacent to the left squamous temple bone region.
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After two practice sessions, three test sessions followed with 48 hours between tests. All the meters were masked and the type of power applied to the antenna controlled by a coded three-way switch to select between no field, an analogue (exüposure 1) or a digitalmode (exposure 2).
In both groups, the only test affected was the choice reaction time and this showed as an increase in speed, i.e. a decrease in reaction time. There was no systematic error introduced as a result of consumption of substances or sleep time. The authors concluded that the increase in responsiveness, strongly in the analogue and less in the digital simulation, in choice reaction time could be associated with an effect on the angular gyrus that acts as an interface between the visual and speech centres. It lies directly under and on the same side as the antenna. Such an effect could be consistent with mild localized heating, or a non-thermal response.
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Are there modulated Electromagnetic Field Effects on Human Conscious Perception during Attentional Blink Test?
Terao Y et al.
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Effect on human attention of exposure to the electromagnetic field emitted by mobile phones
Petrides M
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Exposure to electromagnetic fields by using cellular telephones and its influence on the brain
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