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- Title
Acute mobile phones exposure affects frontal cortex hemodynamics as evidenced by functional near-infrared spectroscopy.
- Authors
Curcio, Giuseppe; Ferrara, Michele; Limongi, Tania; Tempesta, Daniela; Di Sante, Gabriele; De Gennaro, Luigi; Quaresima, Valentina; Ferrari, Marco
- Abstract
This study aimed to evaluate by functional near-infrared spectroscopy (fNIRS), the effects induced by an acute exposure (40 mins) to a GSM (Global System for Mobile Communications) signal emitted by a mobile phone (MP) on the oxygenation of the frontal cortex. Eleven healthy volunteers underwent two sessions (Real and Sham exposure) after a crossover, randomized, double-blind paradigm. The whole procedure lasted 60 mins: 10-mins baseline (Bsl), 40-mins (Exposure), and 10-mins recovery (Post-Exp). Together with frontal hemodynamics, heart rate, objective and subjective vigilance, and self-evaluation of subjective symptoms were also assessed. The fNIRS results showed a slight influence of the GSM signal on frontal cortex, with a linear increase in [HHb] as a function of time in the Real exposure condition (F4,40=2.67; P=0.04). No other measure showed any GSM exposure-dependent changes. These results suggest that fNIRS is a convenient tool for safely and noninvasively investigating the cortical activation in MP exposure experimental settings. Given the short-term effects observed in this study, the results should be confirmed on a larger sample size and using a multichannel instrument that allows the investigation of a wider portion of the frontal cortex.Journal of Cerebral Blood Flow & Metabolism (2009) 29, 903–910; doi:10.1038/jcbfm.2009.14; published online 25 February 2009
- Subjects
NEAR infrared spectroscopy; GSM communications; CEREBRAL circulation; ELECTROMAGNETISM; RADIO frequency; HEART beat
- Publication
Journal of Cerebral Blood Flow & Metabolism, 2009, Vol 29, Issue 5, p903
- ISSN
0271-678X
- Publication type
Article
- DOI
10.1038/jcbfm.2009.14