Changes in human EEG alpha activity following exposure to two different pulsed magnetic field sequences.

Abstract:

:The present study investigates the effects of a weak (+/-200 microT(pk)), pulsed, extremely low frequency magnetic field (ELF MF) upon the human electroencephalogram (EEG). We have previously determined that exposure to pulsed ELF MFs can affect the EEG, notably the alpha frequency (8-13 Hz) over the occipital-parietal region of the scalp. In the present study, subjects (n = 32) were exposed to two different pulsed MF sequences (1 and 2, used previously) that differed in presentation rate, in order to examine the effects upon the alpha frequency of the human EEG. Results suggest that compared to sham exposure, alpha activity was lowered over the occipital-parietal regions of the brain during exposure to Sequence 1, while alpha activity over the same regions was higher after Sequence 2 exposure. These effects occurred after approximately 5 min of pulsed MF exposure. The results also suggest that a previous exposure to the pulsed MF sequence determined subjects' responses in the present experiment. This study supports our previous observation of EEG changes after 5 min pulsed ELF MF exposure. The results of this study are also consistent with existing EEG experiments of ELF MF and mobile phone effects upon the brain.

journal_name

Bioelectromagnetics

journal_title

Bioelectromagnetics

authors

Cook CM,Saucier DM,Thomas AW,Prato FS

doi

10.1002/bem.20434

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

9-20

issue

1

eissn

0197-8462

issn

1521-186X

journal_volume

30

pub_type

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