Effect of a 915-MHz simulated mobile phone signal on cognitive function in man.
To examine whether a simulated mobile telephone transmission at 915MHz has an effect on cognitive function in man.
Materials and methods
Thirty-six subjects in two groups were each given two training sessions and then three test sessions in a randomized three-way cross-over design.
About I W mean power at 915 MHz from a quarter-wave antenna mounted on a physical copy of an analogue phone, as a sine wave, or modulated at 217 Hz with 12.5% duty cycle, or no power, was applied to the left squamous temple region of the subjects while they undertook a series of cognitive function tests lasting ~25-30 min.
The second group was investigated for sleep, consumption of alcohol and beverages, and any other substances that might affect performance.
In both groups, the only test affected was the choice reaction time and this showed as an increase in speed (a decrease in reaction time).
There were no changes in word, number or picture recall, or in spatial memory.
While an effect of visit-order was evident suggesting a learning effect of repeat tests, the design of the study allowed for this.
Additionally, there was no systematic error introduced as a result of consumption of substances or sleep time.
There was evidence of an increase in responsiveness, strongly in the analogue and less in the digital simulation, in choice reaction time. (...)
Mots-clés Pascal : Effet biologique, Homme, Téléphone, Radiocommunication, Simulation, Analyse fonctionnelle, Système nerveux central, Système cognitif, Rayonnement non ionisant, Temps réaction, Analyse multivariable
Mots-clés Pascal anglais : Biological effect, Human, Telephone, Radio communication, Simulation, Functional analysis, Central nervous system, Cognitive system, Non ionizing radiation, Reaction time, Multivariate analysis
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 99-0258071
Code Inist : 002A08F01. Création : 16/11/1999.