Mobile phones exposure induces changes of contingent negative variation in humans
de Tommaso M, Rossi P, Falsaperla R, Francesco Vde V, Santoro R, Federici A · 2009
View Original AbstractA brain-activity measure called iCNV decreased during both real and sham phone exposure compared with a phone switched off.
Plain English Summary
Researchers evaluated whether 900 MHz GSM phone exposure changed a brain electrical measure called the initial contingent negative variation (iCNV) in healthy volunteers using a double blind design. Ten healthy right-handed volunteers were evaluated, each recorded during a 10 min time interval in each of the three experimental conditions: a real emitting phone, a sham phone whose power was dissipated internally, and a phone switched off. The iCNV amplitude decreased and habituation increased during both the real and sham phone conditions compared with the off condition, with no significant prevalence of iCNV amplitude reduction on the left side, where the phones were located.
Why This Matters
The sham condition used a real phone where the electromagnetic power was dissipated on an internal load, while the off condition used a phone completely switched-off. Because iCNV changes appeared in both the real and sham exposure conditions, the researchers suggested that the effect could be explained in terms of an effect induced by both the GSM signal and the extremely low frequency magnetic field produced by battery and internal circuits. The researchers described mobile phone exposures A and B as seeming to act on brain electrical activity, reducing the arousal and expectation of warning stimulus. The authors noted that this evidence is limited by the low number of subjects investigated.
Exposure Details
- SAR
- 0.5 W/kg
- Source/Device
- 900 MHz GSM
- Exposure Duration
- 48 experiments with pauses of 4 to 6 s
Exposure Context
This study used 0.5 W/kg for SAR (device absorption):
- 1.3x above the Building Biology guideline of 0.4 W/kg
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 Details
The aim of the present study was the evaluation of initial contingent negative variation (iCNV) changes, induced by 900 MHz GSM exposure, in a double blind design in healthy volunteers, subjected to a threefold experimental condition, EXPOSED (A), a real GSM phone emitting electromagnetic power, SHAM (B), a real phone where the electromagnetic power was dissipated on an internal load and OFF (C), a phone completely switched-off.
Ten healthy right-handed volunteers were evaluated. The CNV was recorded during a 10 min time interv...
The iCNV amplitude decreased and habituation increased during both A and B conditions, compared with...
This evidence, limited by the low number of subjects investigated, could be explained in terms of an effect induced by both the GSM signal and the extremely low frequency magnetic field produced by battery and internal circuits.
Show BibTeX
@article{m_2009_mobile_phones_exposure_induces_88,
author = {de Tommaso M and Rossi P and Falsaperla R and Francesco Vde V and Santoro R and Federici A},
title = {Mobile phones exposure induces changes of contingent negative variation in humans},
year = {2009},
url = {https://www.sciencedirect.com/science/article/abs/pii/S0304394009011355},
}