The Effect of GSM Electromagnetic Field Exposure on the Waking Electroencephalogram: Methodological Influences.
alpha spectral power
ceiling effect
electroencephalography
radiofrequency electromagnetic fields
signal to noise ratio
Journal
Bioelectromagnetics
ISSN: 1521-186X
Titre abrégé: Bioelectromagnetics
Pays: United States
ID NLM: 8008281
Informations de publication
Date de publication:
May 2021
May 2021
Historique:
revised:
07
03
2021
received:
21
04
2020
accepted:
26
03
2021
pubmed:
14
4
2021
medline:
26
10
2021
entrez:
13
4
2021
Statut:
ppublish
Résumé
Although there is consistent evidence that exposure to radiofrequency electromagnetic fields (RF-EMF) increases the spontaneous resting alpha spectral power of the electroencephalogram (EEG), the reliability of this evidence is uncertain as some studies have also failed to observe this effect. The present study aimed to determine whether the effect of RF-EMF exposure on EEG alpha power depends on whether EEG is derived from eyes open or closed conditions and assessed earlier (<5-min) versus later (>25-min) in the exposure interval. Thirty-six adults participated in three experimental sessions, each involving one exposure: "Sham," "Low," and "High" RF-EMF corresponding to peak spatial specific absorption rates averaged over 10 g of 0, 1, and 2 W/kg, respectively. Resting EEG was recorded at baseline (no exposure), during, and after exposure. Alpha power increase was found to be greater for the eyes open than eyes closed EEG during both the High (P = 0.04) and Low (P = 0.04) RF-EMF exposures. There was also a trend toward it being larger at the end, versus the start of the "High" 30-min exposure (P < 0.01; eyes open condition). This suggests that the use of eyes closed conditions, and insufficient RF-EMF exposure durations, are likely explanations for the failure of some studies to detect an RF-EMF exposure-related increase in alpha power, as such methodological choices decrease signal-to-noise ratios and increase type II error.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
317-328Subventions
Organisme : National Health and Medical Research Council
ID : 1042464
Informations de copyright
© 2021 Bioelectromagnetics Society.
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