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Brain & Nervous System

Using the nonlinear control of anaesthesia-induced hypersensitivity of EEG at burst suppression level to test the effects of radiofrequency radiation on brain function.

No Effects Found

Lipping T, Rorarius M, Jäntti V, Annala K, Mennander A, Ferenets R, Toivonen T, Toivo T, Värri A, Korpinen L. · 2009

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No correlation between exposure and EEG bursts was found in phase I, no significant EEG changes occurred in phase II, but subcutaneous temperature rose 1.6°C and heart rate increased 14.2 bpm during 10-minute exposures.

Plain English Summary

Summary written for general audiences

Eleven pigs were anaesthetized to a burst-suppression EEG level and exposed to a GSM mobile phone signal at 890 MHz. In phase I, EMF stimulation was randomly switched on and off to study the relation between EEG bursts and EMF onsets and endpoints. In phase II, continuous RF stimulation at 31 W/kg was applied for 10 minutes while ECG, EEG, and subcutaneous temperature were recorded. No correlation between exposure and EEG burst occurrences was observed in phase I, and no significant EEG changes were found in phase II. Subcutaneous temperature increased by 1.6°C and heart rate by 14.2 bpm on average during the 10-minute exposure periods.

Why This Matters

The burst-suppression phenomenon represents a nonlinear control system where low-amplitude EEG abruptly switches to very high amplitude bursts, and this switching can be triggered by very minor stimuli and described as hypersensitivity. The hypothesis that RF radiation would produce sensory stimulation or directly affect the brain to produce EEG bursts during suppression was not confirmed. At the burst-suppression anaesthesia level, both humans and animals show high sensitivity to external stimuli that produce EEG bursts during suppression.

Exposure Details

SAR
31 W/kg
Source/Device
890 MHz GSM Mobile Phine
Exposure Duration
10 minute continuous exposure

Exposure Context

This study used 31 W/kg for SAR (device absorption):

Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 31 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern range (Building Biology)This level is 19 times the FCC limit
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 890 MHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 890 MHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

To investigate by using the nonlinear control of anaesthesia-induced hypersensitivity of EEG at burst suppression level to test the effects of radiofrequency radiation on brain function

In this study, investigating the effects of mobile phone radiation on test animals, eleven pigs were...

No correlation between the exposure and the EEG burst occurrences was observed in phase I measuremen...

The hypothesis that RF radiation would produce sensory stimulation of somatosensory, auditory or visual system or directly affect the brain so as to produce EEG bursts during suppression was not confirmed.

Cite This Study
Lipping T, Rorarius M, Jäntti V, Annala K, Mennander A, Ferenets R, Toivonen T, Toivo T, Värri A, Korpinen L. (2009). Using the nonlinear control of anaesthesia-induced hypersensitivity of EEG at burst suppression level to test the effects of radiofrequency radiation on brain function. Nonlinear Biomed Phys. 3(1):5, 2009.
Show BibTeX
@article{t_2009_using_the_nonlinear_control_2781,
  author = {Lipping T and Rorarius M and Jäntti V and Annala K and Mennander A and Ferenets R and Toivonen T and Toivo T and Värri A and Korpinen L.},
  title = {Using the nonlinear control of anaesthesia-induced hypersensitivity of EEG at burst suppression level to test the effects of radiofrequency radiation on brain function.},
  year = {2009},
  doi = {10.1186/1753-4631-3-5},
  url = {https://nonlinearbiomedphys.biomedcentral.com/articles/10.1186/1753-4631-3-5},
}
DOI: 10.1186/1753-4631-3-5

Cited By (6 papers)

Quick Questions About This Study

The animals were exposed to a pulse-modulated GSM mobile phone signal at 890 MHz.
No correlation between exposure and EEG burst occurrences was observed in phase I, and no significant changes in EEG activity were found in phase II.
Subcutaneous temperature increased by 1.6°C and heart rate increased by 14.2 bpm on average during the 10-minute exposure periods.
The hypothesis was that RF radiation would produce sensory stimulation of somatosensory, auditory, or visual systems or directly affect the brain to produce EEG bursts during suppression.
Eleven pigs were anaesthetized to the level where a burst-suppression pattern appears in the EEG.