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.
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.
Eltiti S et al.
Short-term exposure to mobile phone base station signals does not affect cognitive functioning or physiological measures in individuals who report sensitivity to electromagnetic fields and controls
Luria R et al.
Cognitive effects of radiation emitted by cellular phones: the influence of exposure side and time