Australië/Spanje: Mobiele telefonie beďnvloedt cognitief functioneren.

woensdag, 18 mei 2011 - Categorie: Onderzoeken

Bron: Clinical Neurophysiol. 2011 May 11.

Effects of 2G and 3G mobile phones on performance and electrophysiology in adolescents, young adults and older adults.

Leung S, Croft RJ, McKenzie RJ, Iskra S, Silber B, Cooper NR, O'Neill B, Cropley V, Diaz-Trujillo A, Hamblin D, Simpson D.

SourceBrain Sciences Institute, Swinburne University of Technology, Melbourne, Australia;
School of Psychology, University of Wollongong, Wollongong, Australia;
Australian Centre for Radiofrequency Bioeffects Research, Australia;
Institute for Brain, Cognition and Behavior (IR3C), University of Barcelona, Catalonia, Spain;
Cognitive Neuroscience Research Group, Department of Psychiatry and Clinical Psychobiology, University of Barcelona, Catalonia, Spain.

Abstract
OBJECTIVE: This study examined sensory and cognitive processing in adolescents, young adults and older adults, when exposed to 2nd (2G) and 3rd (3G) generation mobile phone signals.

METHODS: Tests employed were the auditory 3-stimulus oddball and the N-back. Forty-one 13-15year olds, forty-two 19-40year olds and twenty 55-70year olds were tested using a double-blind cross-over design, where each participant received Sham, 2G and 3G exposures, separated by at least 4days.

RESULTS: 3-Stimulus oddball task: Behavioural: accuracy and reaction time of responses to targets were not affected by exposure. Electrophysiological: augmented N1 was found in the 2G condition (independent of age group). N-back task: Behavioural: the combined groups performed less accurately during the 3G exposure (compared to Sham), with post hoc tests finding this effect separately in the adolescents only. Electrophysiological: delayed ERD/ERS responses of the alpha power were found in both 3G and 2G conditions (compared to Sham; independent of age group).

CONCLUSION: Employing tasks tailored to each individual's ability level, this study provides support for an effect of acute 2G and 3G exposure on human cognitive function.

SIGNIFICANCE: The subtlety of mobile phone effect on cognition in our study suggests that it is important to account for individual differences in future mobile phone research.

Voor het originele abstract zie:
www.ncbi.nlm.nih.gov/pubmed/21570341?dopt=Abstract .



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