Medical/biological study (experimental study)

Whole brain EEG synchronization likelihood modulated by long term evolution electromagnetic fields exposure med./bio.

By: Lv B, Su C, Yang L, Xie Y, Wu T

Published in: 2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, Chicago, IL, USA. IEEE, 2014: pp. 986-989; ISBN 978-1-4244-7929-0

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Aim of study (acc. to author)

The effects of an acute exposure of human probands to a 2573 MHz electromagnetic field on the neural synchronization in the brain should be investigated.

Background/further details

Ten healthy subjects participated at two sessions (exposure and sham exposure), respectively, with each session lasting for 50 minutes (10 min rest, 30 minutes exposure or sham exposure, 10 minutes rest) and being conducted with an interval of one week.

Endpoint

effects on the neurological system: neural synchronization in the brain

Exposure

- 2.573 GHz
- mobile communications
- mobile phone
- LTE

Exposure	Parameters
Exposure 1: 2.573 GHz Exposure duration: continuous for 30 min	-

Exposure 1

Main characteristics

Frequency	2.573 GHz
Type	electromagnetic field
Exposure duration	continuous for 30 min

Exposure setup

Exposure source	dipole antenna
Distance between exposed object and exposure source	1 cm
Setup	subjects sat on a chair with their eyes closed; antenna was placed at the right ear with 1 cm distance, signal was generated by LTE generator and amplifier
Sham exposure	A sham exposure was conducted.

Parameters

No parameters are specified for this exposure.

Reference articles

Lv B et al. (2014): The alteration of spontaneous low frequency oscillations caused by acute electromagnetic fields exposure
Wu T et al. (2012): Dosimetric studies involving in the experiments for the evaluation of the brain activation by LTE exposure

Exposed system:

human
partial body: right ear

Methods Endpoint/measurement parameters/methodology

effects on the neurological system: neural synchronization in the brain (EEG, synchronization likelihood method)

Investigated system:

investigation on living organism

Investigated organ system:

brain/CNS

Time of investigation:

before exposure
during exposure
after exposure

Main outcome of study (acc. to author)

Several statistically significant synchronization events were found in different frequency bands of exposed probands compared to sham exposure during and after exposure. The main areas of synchronization were located in the left and middle prefrontal areas and the right temporal areas.
The authors conclude that an acute exposure of human probands to a 2573 MHz electromagnetic field can modulate the brain activity, even in brain regions remote from the source of exposure.

Study character:

medical/biological study
experimental study
full/main study
randomized, double blind study, cross-over study

Study funded by

National Key Basic Research Project, China
National Natural Science Foundation (NSFC), China

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