Mobiele telefoon beinvloedt bloedstroom en metabolisme in de hersenen
zondag, 02 juli 2006 - Categorie: Onderzoeken
Journal of Cerebral Blood Flow & Metabolism (2006) 26, 885–890. doi:10.1038/sj.jcbfm.9600279; published online 22 February 2006
Mobile phone affects cerebral blood flow in humans
Sargo Aalto1,2, Christian Haarala3,4, Anna Brück1, Hannu Sipilä1, Heikki Hämäläinen3,4 and Juha O Rinne1
1Turku PET Centre, University of Turku, Turku, Finland
2Department of Psychology, Ćbo Akademi University, Ćbo, Finland
3Centre for Cognitive Neuroscience, University of Turku, Turku, Finland
4Department of Psychology, University of Turku, Turku, Finland
Correspondence: S Aalto, Turku PET Centre, University of Turku, PO Box 52, FIN-20521 Turku, Finland. E-mail: email@example.com
Received 2 August 2005; Revised 20 September 2005; Accepted 19 October 2005; Published online 22 February 2006.
Mobile phones create a radio-frequency electromagnetic field (EMF) around them when in use, the effects of which on brain physiology in humans are not well known. We studied the effects of a commercial mobile phone on regional cerebral blood flow (rCBF) in healthy humans using positron emission tomography (PET) imaging. Positron emission tomography data was acquired using a double-blind, counterbalanced study design with 12 male subjects performing a computer-controlled verbal working memory task (letter 1-back). Explorative and objective voxel-based statistical analysis revealed that a mobile phone in operation induces a local decrease in rCBF beneath the antenna in the inferior temporal cortex and an increase more distantly in the prefrontal cortex. Our results provide the first evidence, suggesting that the EMF emitted by a commercial mobile phone affects rCBF in humans. These results are consistent with the postulation that EMF induces changes in neuronal activity.
Keywords: cerebral blood flow, electromagnetic field, human, mobile phones, positron emission tomography
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