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

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dc.contributor.author Lipping, Tarmo -
dc.contributor.author Rorarius, Michael -
dc.contributor.author Jäntti, Ville -
dc.contributor.author Annala, Kari -
dc.contributor.author Mennander, Ari -
dc.contributor.author Ferenets, Rain -
dc.contributor.author Toivonen, Tommi -
dc.contributor.author Toivo, Tim -
dc.contributor.author Värri, Alpo -
dc.contributor.author Korpinen, Leena -
dc.date.accessioned 2012-06-17T20:16:39Z
dc.date.available 2012-06-16 12:18:15 -
dc.date.available 2012-06-17T20:16:39Z
dc.date.issued 2009 -
dc.identifier.issn 1753-4631 -
dc.identifier.uri http://tampub.uta.fi/handle/10024/66286
dc.description BioMed Central Open access -
dc.description.abstract Background In this study, investigating the effects of mobile phone radiation on test animals, eleven pigs were anaesthetised to the level where burst-suppression pattern appears in the electroencephalogram (EEG). At this level of anaesthesia both human subjects and animals show high sensitivity to external stimuli which produce EEG bursts during suppression. The burst-suppression phenomenon represents a nonlinear control system, where low-amplitude EEG abruptly switches to very high amplitude bursts. This switching can be triggered by very minor stimuli and the phenomenon has been described as hypersensitivity. To test if also radio frequency (RF) stimulation can trigger this nonlinear control, the animals were exposed to pulse modulated signal of a GSM mobile phone at 890 MHz. In the first phase of the experiment electromagnetic field (EMF) stimulation was randomly switched on and off and the relation between EEG bursts and EMF stimulation onsets and endpoints were studied. In the second phase a continuous RF stimulation at 31 W/kg was applied for 10 minutes. The ECG, the EEG, and the subcutaneous temperature were recorded. Results No correlation between the exposure and the EEG burst occurrences was observed in phase I measurements. No significant changes were observed in the EEG activity of the pigs during phase II measurements although several EEG signal analysis methods were applied. The temperature measured subcutaneously from the pigs' head increased by 1.6°C and the heart rate by 14.2 bpm on the average during the 10 min exposure periods. Conclusion 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. -
dc.language.iso en -
dc.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 -
dc.type fi=Artikkeli aikakauslehdessä | en=Journal article| -
dc.identifier.urn urn:nbn:uta-3-547 -
dc.identifier.doi 10.1186/1753-4631-3-5 -
dc.type.version fi=Kustantajan versio | en=Publisher's version| -
dc.subject.okm fi=Kirurgia, anestesiologia, tehohoito, radiologia | en=Surgery, Anesthesiology, Intensive Care| -
dc.journal.title Nonlinear Biomedical Physics -
dc.journal.volume 3 -
dc.journal.number 5 -
dc.journal.volumepagerange 1-10 -
dc.oldstats 77 -

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