4
Mrz
2006

Mobile phone affects cerebral blood flow in humans

J Cereb Blood Flow Metab. 2006 Feb 22; [Epub ahead of print]

Aalto S, Haarala C, Bruck A, Sipila H, Hamalainen H, Rinne JO.

[1] 1Turku PET Centre, University of Turku, Turku, Finland [2] 2Department of Psychology, Abo Akademi University, Abo, Finland.

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.

PMID: 16495939 [PubMed - as supplied by publisher]

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