The Alpha Band of the Resting Electroencephalogram Under Pulsed and Continuous Radio Frequency Exposures

Perentos, Nicholas; Croft, Rodney J.; McKenzie, Raymond J.; Cosic, Irena

doi:10.1109/tbme.2013.2241059

Cited by 29 publications

(39 citation statements)

References 23 publications

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“…The above findings however are not consistent with results from a large and well-controlled study by Perentos et al (2013) who investigated the effects on the EEG of GSM-like signals (900 Mz, pulsed at 2.1,8.3 and 217 Hz), continuous RF with the same carrier frequency, ELF-EMF with the same pulsing rates as the GSM signal and sham exposure. They found that both GSM-like RF and continuous RF had significant and comparable effects on the EEG but ELF did not.…”

Section: Discussioncontrasting

confidence: 86%

Acute Exposure to Terrestrial Trunked Radio (TETRA) has effects on the electroencephalogram and electrocardiogram, consistent with vagal nerve stimulation

Burgess

Fouquet

Seri

et al. 2016

Environmental Research

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BackgroundTerrestrial Trunked Radio (TETRA) is a telecommunications system widely used by police and emergency services around the world. The Stewart Report on mobile telephony and health raised questions about possible health effects associated with TETRA signals. This study investigates possible effects of TETRA signals on the electroencephalogram and electrocardiogram in human volunteers.MethodsBlinded randomized provocation study with a standardized TETRA signal or sham exposure. In the first of two experiments, police officers had a TETRA set placed first against the left temple and then the upper-left quadrant of the chest and the electroencephalogram was recorded during rest and active cognitive processing. In the second experiment, volunteers were subject to chest exposure of TETRA whilst their electroencephalogram and heart rate variability derived from the electrocardiogram were recorded.ResultsIn the first experiment, we found that exposure to TETRA had consistent neurophysiological effects on the electroencephalogram, but only during chest exposure, in a pattern suggestive of vagal nerve stimulation. In the second experiment, we observed changes in heart rate variability during exposure to TETRA but the electroencephalogram effects were not replicated.ConclusionsObserved effects of exposure to TETRA signals on the electroencephalogram (first experiment) and electrocardiogram are consistent with vagal nerve stimulation in the chest by TETRA. However given the small effect on heart rate variability and the lack of consistency on the electroencephalogram, it seems unlikely that this will have a significant impact on health. Long-term monitoring of the health of the police force in relation to TETRA use is on-going.

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Section: Discussioncontrasting

confidence: 86%

Acute Exposure to Terrestrial Trunked Radio (TETRA) has effects on the electroencephalogram and electrocardiogram, consistent with vagal nerve stimulation

Burgess

Fouquet

Seri

et al. 2016

Environmental Research

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“…Perentos et al 64 observed a suppression of the global alpha band (8-12.75 Hz) activity under a 20-min low-level Real GSM-like extremely low frequency (ranging from direct current to at least 40 kHz) exposure compared to Sham in the exposed hemisphere only. In their follow-up study, 63 it was found that this decrease in alpha band power was present also both under pulse modulated and continuous GSM RF exposure. Another article 56 reported a statistically significant decrease of the alpha band spectral power in the post-exposure session after GSM RF exposure.…”

Section: Discussionmentioning

confidence: 95%

“…In terms of waking EEG, the effect of RF (considering GSM systems) has been predominantly shown to increase alpha band power, [57][58][59][60][61] although some reductions of alpha band power have also been reported. 56,[62][63][64] In a single-blind study by D'Costa et al, 62 during a single 25-min Real GSM exposure, statistically significant decreases were found in EEG power at 8 Hz and 9 Hz in the occipital region, and at 7 Hz and 9 Hz in both the occipital end central recording sites compared to Sham exposure. Perentos et al 64 observed a suppression of the global alpha band (8-12.75 Hz) activity under a 20-min low-level Real GSM-like extremely low frequency (ranging from direct current to at least 40 kHz) exposure compared to Sham in the exposed hemisphere only.…”

Section: Discussionmentioning

confidence: 97%

Short-term radiofrequency exposure from new generation mobile phones reduces EEG alpha power with no effects on cognitive performance

Vecsei

Knakker

Juhász

et al. 2018

Preprint

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Although mobile phone (MP) use has been steadily increasing in the last decades and similar positive trends are expected for the near future, systematic investigations on neurophysiological and cognitive effects caused by recently developed technological standards for MPs are scarcely available. Here, we investigated the effects of radiofrequency (RF) fields emitted by new-generation mobile technologies, specifically, Universal Mobile Telecommunications System (UMTS) and LongTerm Evolution (LTE), on intrinsic scalp EEG activity in the alpha band (8-12 Hz) and cognitive performance in the Stroop test. The study involved 60 healthy, young-adult university students (34 for UMTS and 26 for LTE) with double-blind administration of Real and Sham exposure in separate sessions. EEG was recorded before, during and after RF exposure, and Stroop performance was assessed before and after EEG recording. Both RF exposure types caused a notable decrease in the alpha power over the whole scalp that persisted even after the cessation of the exposure, whereas no effects were found on any aspects of performance in the Stroop test. The results imply that the brain networks underlying global alpha oscillations might require minor reconfiguration to adapt to the local biophysical changes caused by focal RF exposure mimicking MP use.

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“…Indeed, data reported by some authors showed an increase in EEG power in the alpha frequency band (Cook et al 2004;Croft et al 2002Croft et al , 2008Croft et al , 2010Curcio et al 2005;Hinrikus et al 2008;Huber et al 2002;Kramarenko and Tan 2003;Regel et al 2007;Reiser et al 1995), whereas other studies reported a decrease in EEG power or coherence in the alpha band (Maby et al 2006;Perentos et al 2013;Vecchio et al 2007Vecchio et al , 2010Vecchio et al , 2012. Finally, other studies failed to show an effect on EEG power in the alpha bands (D'Costa 2003; Hietanen et al 2000;Röschke and Mann, 1997;Perentos et al 2007).…”

mentioning

confidence: 96%

Radiofrequency signal affects alpha band in resting electroencephalogram

Ghosn

Yahia-Chérif

Hugueville

et al. 2015

Journal of Neurophysiology

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The aim of the present work was to investigate the effects of the radiofrequency (RF) electromagnetic fields (EMFs) on human resting EEG with a control of some parameters that are known to affect alpha band, such as electrode impedance, salivary cortisol, and caffeine. Eyes-open and eyes-closed resting EEG data were recorded in 26 healthy young subjects under two conditions: sham exposure and real exposure in double-blind, counterbalanced, crossover design. Spectral power of EEG rhythms was calculated for the alpha band (8 -12 Hz). Saliva samples were collected before and after the study. Salivary cortisol and caffeine were assessed by ELISA and HPLC, respectively. The electrode impedance was recorded at the beginning of each run. Compared with the sham session, the exposure session showed a statistically significant (P Ͻ 0.0001) decrease of the alpha band spectral power during closed-eyes condition. This effect persisted in the postexposure session (P Ͻ 0.0001). No significant changes were detected in electrode impedance, salivary cortisol, and caffeine in the sham session compared with the exposure one. These results suggest that GSM-EMFs of a mobile phone affect the alpha band within spectral power of resting human EEG. electroencephalogram; radio frequency; mobile phone; alpha band EMERGING TECHNOLOGIES IN MOBILE telecommunications, such as radio frequency fields (RF) and microwave radiation, are widely used in our modern society. Prominent examples are the wireless Internet network and mobile phone communications, which are particularly widespread. The extensive use of mobile phones (MP) increases the exposure of human beings to radiofrequency electromagnetic fields. During a phone call, given the close proximity of the MP to the user's head, a part of the electromagnetic field (EMF) can be absorbed by the head and the brain (Schönborn et al. 1998). This exposure to EMF has raised questions about possible effects of the EMF of mobile phones on brain activity.Some earlier studies have investigated the effects of EMFs on resting cerebral activity with somewhat mixed results, but more recently, there has been consistent data, indicating the existence of exposure effects on the alpha bands of the resting EEG.Indeed, data reported by some authors showed an increase in EEG power in the alpha frequency band (Cook et al. 2004;Croft et al.

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The Alpha Band of the Resting Electroencephalogram Under Pulsed and Continuous Radio Frequency Exposures

Cited by 29 publications

References 23 publications

Acute Exposure to Terrestrial Trunked Radio (TETRA) has effects on the electroencephalogram and electrocardiogram, consistent with vagal nerve stimulation

Acute Exposure to Terrestrial Trunked Radio (TETRA) has effects on the electroencephalogram and electrocardiogram, consistent with vagal nerve stimulation

Short-term radiofrequency exposure from new generation mobile phones reduces EEG alpha power with no effects on cognitive performance

Radiofrequency signal affects alpha band in resting electroencephalogram

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