Acute mobile phone operation affects neural function in humans

Croft, Rodney J.; Chandler, Jody S.; Burgess, Adrian; Barry, Robert J.; Williams, John D.; Clarke, Adam R.

doi:10.1016/s1388-2457(02)00215-8

Cited by 180 publications

(160 citation statements)

References 16 publications

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“…We excluded one study that had been funded by a company producing "shielding" devices that reduce EMF exposure (Croft et al 2002). A total of 59 studies were included: 12 (20%) were exclusively funded by the telecommunications industry, 11 (19%) were funded by public agencies or charities, 14 (24%) had mixed funding (including industry and industry-independent sources), and in 22 (37%) studies the source of funding was not reported.…”

Section: Resultsmentioning

confidence: 99%

Source of Funding and Results of Studies of Health Effects of Mobile Phone Use: Systematic Review of Experimental Studies

Huss¹,

Egger²,

Hug³

et al. 2006

Epidemiology

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OBJECTIVES: There is concern regarding the possible health effects of cellular telephone use. We examined whether the source of funding of studies of the effects of low-level radiofrequency radiation is associated with the results of studies. We conducted a systematic review of studies of controlled exposure to radiofrequency radiation with health-related outcomes (electroencephalogram, cognitive or cardiovascular function, hormone levels, symptoms, and subjective well-being). DATA SOURCES: We searched EMBASE, Medline, and a specialist database in February 2005 and scrutinized reference lists from relevant publications. DATA EXTRACTION: Data on the source of funding, study design, methodologic quality, and other study characteristics were extracted. The primary outcome was the reporting of at least one statistically significant association between the exposure and a health-related outcome. Data were analyzed using logistic regression models. DATA SYNTHESIS: Of 59 studies, 12 (20%) were funded exclusively by the telecommunications industry, 11 (19%) were funded by public agencies or charities, 14 (24%) had mixed funding (including industry), and in 22 (37%) the source of funding was not reported. Studies funded exclusively by industry reported the largest number of outcomes, but were least likely to report a statistically significant result: The odds ratio was 0.11 (95% confidence interval, 0.02-0.78), compared with studies funded by public agencies or charities. This finding was not materially altered in analyses adjusted for the number of outcomes reported, study quality, and other factors.

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Section: Resultsmentioning

confidence: 99%

Source of Funding and Results of Studies of Health Effects of Mobile Phone Use: Systematic Review of Experimental Studies

Huss¹,

Egger²,

Hug³

et al. 2006

Epidemiology

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“…Earlier behavioral studies, for example, reported faster response speed in attention or working memory tasks (Preece et al, 1999;Koivisto et al, 2000a, b;Edelstyn and Oldershaw, 2002), but later more stringent studies (e.g., with corrections for multiple comparisons) failed to replicate such findings. Results of electroencephalography studies have also been contradictory particularly in the a band: some studies reported increased a activity (Croft et al, 2002(Croft et al, , 2008Curcio et al, 2005;Regel et al, 2007), while others found no such effects (Röschke and Mann, 1997;Hietanen et al, 2000;Perentos et al, 2007;Kleinlogel et al, 2008). Among brain imaging methods, positron emission tomography (PET) is particularly suitable because it allows metal parts inside the scanner.…”

Section: Introductionmentioning

confidence: 99%

GSM Mobile Phone Radiation Suppresses Brain Glucose Metabolism

Kwon

Vorobyev

Kännälä

et al. 2011

J Cereb Blood Flow Metab

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We investigated the effects of mobile phone radiation on cerebral glucose metabolism using high-resolution positron emission tomography (PET) with the 18 F-deoxyglucose (FDG) tracer. A long half-life (109 minutes) of the 18 F isotope allowed a long, natural exposure condition outside the PET scanner. Thirteen young right-handed male subjects were exposed to a pulse-modulated 902.4 MHz Global System for Mobile Communications signal for 33 minutes, while performing a simple visual vigilance task. Temperature was also measured in the head region (forehead, eyes, cheeks, ear canals) during exposure. 18 F-deoxyglucose PET images acquired after the exposure showed that relative cerebral metabolic rate of glucose was significantly reduced in the temporoparietal junction and anterior temporal lobe of the right hemisphere ipsilateral to the exposure. Temperature rise was also observed on the exposed side of the head, but the magnitude was very small. The exposure did not affect task performance (reaction time, error rate). Our results show that short-term mobile phone exposure can locally suppress brain energy metabolism in humans.

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“…The consistency observed across these studies could be partly attributed to some common methodologies employed such as accurate dosimetry, the extended duration of exposure and the duration of EEG recording. The significance of the last two factors is discussed comprehensively elsewhere 9 .…”

Section: Introductionmentioning

confidence: 99%

Comparison of the effects of continuous and pulsed mobile phone like RF exposure on the human EEG

Perentos

Croft

McKenzie³

et al. 2007

Australas. Phys. Eng. Sci. Med.

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It is not clear yet whether Global System for Mobiles (GSM) mobile phone radiation has the ability to interfere with normal resting brain function. There have been reports that GSM exposure increases alpha band power, and does so only when the signal is modulated at low frequencies (Huber, R., Treyer, V., Borbely, A. A., Schuderer, J., Gottselig, J. M., Landolt, H.P., Werth, E., Berthold,T., Kuster, N., Buck, A and Achermann, P. Electromagnetic fields, such as those from mobile phones, alter regional cerebral blood flow and sleep and waking EEG. J Sleep Res 11, 289-295, 2002.) However, as that research employed exposure distributions that are not typical of normal GSM handset usage (deep brain areas were overexposed), it remains to be determined whether a similar result patterning would arise from a more representative exposure. In this fully counterbalanced cross-over design, we recruited 12 participants and tried to replicate the modulation linked post exposure alpha band power increase described above, but with an exposure source (dipole antenna) more closely resembling that of a real GSM handset. Exposures lasted for 15 minutes. No changes to alpha power were found for either modulated or unmodulated radiofrequency fields, and thus we failed to replicate the above results. Possible reasons for this failure to replicate are discussed, with the main reason argued to be the lower and more representative exposure distribution employed in the present study. In addition we investigated the possible GSM exposure related effects on the non-linear features of the resting electroencephalogram using the Approximate Entropy (ApEn) method of analysis. Again, no effect was demonstrated for either modulated or unmodulated radiofrequency exposures. AbstractIt is not clear yet whether Global System for Mobiles (GSM) mobile phone radiation has the ability to interfere with normal resting brain function. There have been reports that GSM exposure increases alpha band power, and does so only when the signal is modulated at low frequencies (Huber, R., Treyer, V., Borbely, A. A., Schuderer, 1., Gottselig, 1. M., Landolt, H.P., Werth, E., Berthold,T., Kuster, N., Buck, A and Achennann, P. Electromagnetic fields, such as those from mobile phones, alter regional cerebral blood flow and sleep and waking EEG. J Sleep Res 11, 289-295, 2002.) However, as that research employed exposure distributions that are not typical of normal GSM handset usage (deep brain areas were overexposed), it remains to be detennined whether a similar result patterning would arise from a more representative exposure. In this ful1y counterbalanced cross-over design, we recmited 12 participants and tried to replicate the modulation linked post exposure alpha band power increase described above, but with an exposure source (dipole antenna) more closely resembling that of a real GSM handset. Exposures lasted for 15 minutes. No changes to alpha power were found for either modulated or unmodulated radiofrequency fields, and thus we failed to replicate the ...

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Acute mobile phone operation affects neural function in humans

Cited by 180 publications

References 16 publications

Source of Funding and Results of Studies of Health Effects of Mobile Phone Use: Systematic Review of Experimental Studies

Source of Funding and Results of Studies of Health Effects of Mobile Phone Use: Systematic Review of Experimental Studies

GSM Mobile Phone Radiation Suppresses Brain Glucose Metabolism

Comparison of the effects of continuous and pulsed mobile phone like RF exposure on the human EEG

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