COGNITIVE NEUROSCIENCE AND NEUROPSYCHOLOGYEffects of 902 MHz electromagnetic field emitted by cellular telephones on response times in humansKoivisto, Mika1,4,7; Revonsuo, Antti1,3; Krause, Christina1,4,5; Haarala, Christian1,4; Sillanmäki, Lauri1,6; Laine, Matti1,2; Hämäläinen, Heikki1,4Author Information 1Centre for Cognitive Neuroscience, University of Turku, FIN-20014 Turku 2Departments of Neurology, University of Turku, FIN-20014 Turku 3Departments of Philosophy, University of Turku, FIN-20014 Turku 4Departments of Psychology, University of Turku, FIN-20014 Turku 5Department of Psychology, Åbo Akademi University, Finland 6Departments of Statistics, University of Turku, FIN-20014 Turku 7Corresponding Author: Mika Koivisto Received 2 November 1999; accepted 26 November 1999 Acknowledgements: This study was financially supported by the University of Turku and Nokia Reseach. A.R. (projects 36106 and 45704) and C.K. (projects 7338 and 42536) were supported by the Academy of Finland NeuroReport: February 7, 2000 - Volume 11 - Issue 2 - p 413-415 Buy Abstract The present study examined possible influences of a 902 MHz electromagnetic field emitted by cellular telephones on cognitive functioning in 48 healthy humans. A battery of 12 reaction time tasks was performed twice by each participant in a counterbalanced order: once with and once without the exposure to the field. The results showed that the exposure to the electromagnetic field speeded up response times in simple reaction time and vigilance tasks and that the cognitive time needed in a mental arithmetics task was decreased. The results suggest that exposure to the electromagnetic field emitted by cellular telephones may have a facilitatory effect on brain functioning, especially in tasks requiring attention and manipulation of information in working memory. © 2000 Lippincott Williams & Wilkins, Inc.