• experimental
  
• epidemiological
  

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Medical/biological Study (experimental study)

Repeated exposure to low-level extremely low frequency-modulated microwaves affects cortex-hypothalamus interplay in freely moving rats: EEG study. med./biol.

PubMed Entry

Journal web site

Aim of study (according to author)
To compare the effects of repeated exposure to extremely low frequency-modulated microwaves on cortical and hypothalamic electroencephalograms (EEGs) of freely moving rats.
Background/further details:
The EEGs were recorded for five consecutive days either under sham exposures (five rats) or under mixed sham exposure/microwave exposures (five rats).

Endpoint

• effects on the neurological system: functioning/activation of different brain areas (EEG)

Exposure
General category: digital mobile phone, TDMA, low level microwaves, PW (pulsed wave)

Field characteristics	Parameters
915 MHz frequency modulation, pulsed (PW) exposure duration: intermittently: 1 min on - 1 min off - for 10 min, 3 times per day for 3 days during a 5 day period (see "additional information")	power flux density: 0.3 mW/cm² average over time (at a distance of 30 cm from the antenna) SAR: 0.7 mW/g

Exposed system:
animal (species/strain): rat/Wistar
whole body exposure

Methods
Endpoint/Measurement parameters/Methodology

• effects on the neurological system: EEG (averaged frequency spectra 0.5-30 Hz)

Main outcome of study (according to author)
Extremely low frequency-modulated microwaves increased beta wave₂ activity (17.8-30.5 Hz) in both cortical and hypothalamic EEG. Moreover, a cumulative effect under repeated exposures to extremely low frequency-modulated microwaves was found.
In conclusion, the data are in line with evidence that repeated low-level exposure to extremely low frequency-modulated microwaves affects brain functioning and provide an additional approach when analysing underlying mechanisms.

(Study character: medical/biological study, experimental study, full/main study)

Study funded by

• Ministry for Science and Technology Development, Serbia

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