Mobile phone effects on children's event-related oscillatory EEG during an auditory memory task

Krause, Christina M.; Björnberg, Christian Haarala; Pesonen, Mirka; Hultén, Annika; Liesivuori, Tiia; Koivisto, Mika; Revonsuo, Antti; Laine, Matti; Hämäläinen, Heikki

doi:10.1080/09553000600840922

Cited by 41 publications

(48 citation statements)

References 48 publications

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“…Conversely, whenever attention-demanding mental activity in subjects augments, neuronal activity increases in frontoparietal circuits and alpha power decreases''. Therefore, if alpha rhythm reflects a baseline cortical de-activation, then the increase of alpha power following MP EMF exposure, as observed by several authors [Reiser et al, 1995;Mann and Röschke, 1996;Borbely et al, 1999;Huber et al, 2000Huber et al, , 2002Krause et al, 2000bKrause et al, , 2006Croft et al, 2002;Cook et al, 2004;Curcio et al, 2005], points to a reduced cortical activation as a direct consequence of EMF exposure. Nonetheless, such an effect may also be due to an experimental bias in reproducing an actual situation of resting wakefulness, where the subject is supposed not to think or do anything.…”

Section: Discussion and Perspectivesmentioning

confidence: 74%

“…This study was recently repeated [Krause et al, 2004] with some methodological improvements (double-blind paradigm and left-side exposure), but no significant effect on oscillatory activity was reported. On the other hand, the same group [Krause et al, 2006] in a recent double-blind randomized and counterbalanced study on children (6 boys and 9 girls), reported that EMFs increase ERD/ERS differences during both encoding and recognition. In particular, wavelet signal analysis showed the generalization of a (12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30), an attenuation in the normal decrement over time of theta activity (4-8 Hz band), and an increase in gamma response (30-45 Hz band) over the midline frontal and lateral posterior sites.…”

Section: Effects Of Gsm-like Signals On Evoked Cerebral Activitymentioning

confidence: 89%

“…Three of these are evoked otoacoustic emission studies which highlighted a lack of effects [Janssen et al, 2005;Parazzini et al, 2005;Uloziene et al, 2005], whereas other researchers pointed out a significant variation of the acoustic temporal correlation coefficients following EMF exposure, found both in healthy and epileptic patients [Maby et al, 2005]. Krause et al [2006] 15 children (6 M, 9 F) Finally, the only study using magnetoencephalography (MEG) evaluated the effects of GSM 1800 (217Hz and .125/1 W of power) on memory during encoding of verbal material [Hinrichs and Heinze, 2004]. Magnetic event-related fields were registered during retrieval of stimuli, when subjects (n ¼ 12) had to discriminate already learned words during the presentation of a new list of words.…”

Section: Effects Of Gsm-like Signals On Evoked Cerebral Activitymentioning

confidence: 98%

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Neurophysiological effects of mobile phone electromagnetic fields on humans: A comprehensive review

Valentini¹,

Curcio²,

Moroni³

et al. 2007

Bioelectromagnetics

105

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In recent years a growing number of people have begun to use mobile phone technology. This phenomenon has raised questions and doubts about possible effects on users' brains. This literature review focuses on the human electrophysiological and neuro-metabolic effects of mobile phone (MP)-related electromagnetic fields (EMFs) published in the last 10 years. To this end, all relevant papers have been reported and, subsequently, a literature selection has been carried out by taking several criteria into account, such as: blind techniques, randomization or counter-balancing of conditions and subjects, detail of exposure characteristics and the statistical analyses used. As a result, only the studies meeting the selection criteria have been described, evaluated and discussed further. The main goal of this review is to provide a clear scenario of the most reliable experiments carried out over the last decade and to offer a critical point of view in their evaluation. It is concluded that MP-EMFs may influence normal physiology through changes in cortical excitability and that in future research particular care should be dedicated to both methodological and statistical control, the most relevant criteria in this research field.

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Section: Discussion and Perspectivesmentioning

confidence: 74%

Section: Effects Of Gsm-like Signals On Evoked Cerebral Activitymentioning

confidence: 89%

Section: Effects Of Gsm-like Signals On Evoked Cerebral Activitymentioning

confidence: 98%

See 1 more Smart Citation

Neurophysiological effects of mobile phone electromagnetic fields on humans: A comprehensive review

Valentini¹,

Curcio²,

Moroni³

et al. 2007

Bioelectromagnetics

105

View full text Add to dashboard Cite

show abstract

“…In terms of EEG measures of neural processes relating to audition, there is again no consistency. For example, three studies reported MP-related changes in event-related spectral power, but these were in different directions and frequencies (increase in 18.75Hz to 31.25Hz, Eulitz et al, 1998;decrease in 1-4Hz and increase in 8-12Hz, Croft et al, 2002; changes in 4-8Hz and 15Hz, Krause et al, 2006). Similarly, although there was consistency in event-related potential (ERP) research in that reduced N1 amplitude and latency was found by both Hamblin et al (2004) and Maby et al (2004), Hamblin et al (2006) were not able to replicate those 3 results with a stronger research design that had the added benefit of double-blinding, and this lack of effect was replicated by Kleinlogel et al (2008).…”

Section: Introductionmentioning

confidence: 99%

Effects of 2G and 3G mobile phones on performance and electrophysiology in adolescents, young adults and older adults

Leung¹,

Croft²,

McKenzie³

et al. 2011

Clinical Neurophysiology

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Objective:This study was conducted to examine sensory and cognitive processing in adolescents, young adults and older adults, when exposed to 2nd (2G) and 3rd (3G) generation mobile phone signals. Methods:Tests employed were the auditory oddball and the N-back. Forty-one 13-15 year olds, forty-two 19-40 year olds and twenty 55-70 year olds were tested using a double-blind cross-over design, where each participant received Sham, 2G and 3G exposures, separated by at least 4 days. Results:Accuracy was not affected by exposure overall, but an augmented N1 was found in the 2G condition (independent of age group). The combined groups performed less accurately on the N-back during the 3G exposure (compared to Sham), with post hoc tests finding this effect in the adolescents only. No effect of 2G exposure on N-back was found either overall or in any group separately, and no effect of 2G or 3G exposure was found on reaction time. Neurophysiological underpinnings (event-related alpha; ERA) of the 3G behavioural effects were also affected, with more early ERA and slower late ERA in the 3G (compared to Sham). Conclusion/Significance:Employing tasks tailored to each individual's ability level, this study provides support for an effect of acute 3G exposure on human cognitive function.

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“…Some of the studies indicated that EMF caused a reduction in the voltage of slow potentials. However, a more detailed analysis of the results and their verification in further experiments did not confirm the earlier observations [12][13][14]. Considering the limitations of the EEG method, in our current work we decided to use determinations of P300 wave to assess EMF effect on auditory cortex ERPs.…”

Section: Discussionmentioning

confidence: 99%

Effects of GSM signals during exposure to event related potentials (ERPs)

Bąk¹,

Dudarewicz²,

Zmyślony³

et al. 2010

International Journal of Occupational Medicine and Environmental Health

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Objectives: The primary aim of this work was to assess the effect of electromagnetic field (EMF) from the GSM mobile phone system on human brain function. The assessment was based on the assay of event related potentials (ERPs). Material and Methods:The study group consisted of 15 volunteers, including 7 men and 8 women. The test protocol comprised determination of P300 wave in each volunteer during exposure to the EMF. To eliminate possible effects of the applied test procedure on the final result, the test was repeated without EMF exposure. P300 latency, amplitude, and latency of the N1, N2, P2 waves were analysed. Results: The statistical analysis revealed an effect of EMF on P300 amplitude. In the experiment with EMF exposure, lower P300 amplitudes were observed only at the time in which the volunteers were exposed to EMF; when the exposure was discontinued, the values of the amplitude were the same as those observed before EMF application. No such change was observed when the experiment was repeated with sham exposure, which may be considered as an indirect proof that lower P300 amplitude values were due to EMF exposure. No statistically significant changes were noted in the latencies of the N1, N2, P2 waves that precede the P300 wave, nor in the latency of the P300 itself. Conclusions: The results suggest that exposure to GSM EMF exerts some effects on CNS, including effects on long latency ERPs.

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Mobile phone effects on children's event-related oscillatory EEG during an auditory memory task

Abstract: The current findings suggest that EMF emitted by mobile phones has effects on brain oscillatory responses during cognitive processing in children.

Cited by 41 publications

References 48 publications

Neurophysiological effects of mobile phone electromagnetic fields on humans: A comprehensive review

Neurophysiological effects of mobile phone electromagnetic fields on humans: A comprehensive review

Effects of 2G and 3G mobile phones on performance and electrophysiology in adolescents, young adults and older adults

Effects of GSM signals during exposure to event related potentials (ERPs)

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