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Provides a study abstract reporting regional cerebral blood-flow changes during mobile-phone exposure in twelve male participants; the attached full paper is unread.
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ORIGINAL COMMENT · UNEDITED TEXT
See attached file(s)
Mobile phone affects cerebral blood flow
in humans
2006
Abstract
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.
Journal of Cerebral Blood Flow & Metabolism advance online publication, 22 February 2006; doi:10.1038/sj.jcbfm.9600279
Keywords: cerebral blood flow; electromagnetic field; human; mobile phones; positron emission tomography
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