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To assess the possible effects of electromagnetic field exposure by mobile phones on the event related desynchronisation/synchronisation (ERD/ERS) responses of the 4-6, 6-8, 8-10 and 10-12 Hz EEG frequency bands during cognitive processing.
ERD/ERS is a pattern in the EEG signal, that shows functional alterations of neuronal networks. EEG frequencies are subdivided into frequency bands. The simultaneously recorded responses of different EEG frequency bands differ from each other and reflect different cognitive and/or mental processes.
Modulation type: pulsed
ばく露時間: continuous for about 30 min
|ばく露時間||continuous for about 30 min|
|Pulse width||0.557 ms|
|Repetition frequency||217 Hz|
One time slot was used. Pulse width is probably a misprint instead of 0.577 ms.
|Distance between exposed object and exposure source||20 mm|
|チャンバの詳細||The subject was seated in a comfortable chair in the registration room and was instructed to look at a TV screen placed 1.5 m in front of him/her and to avoid unnecessary eye movements.|
|ばく露装置の詳細||A standard GSM phone was mounted to the subject's head over the right posterior temporal region in a normal use position. The antenna was located about 20 mm from the skin. The phone was operated via a computer from an adjacent room.|
|Additional information||Each EEG test session was subdivided into two segments, with or without EMF in single-blind, counterbalanced order. The total testing time was about 60 min.|
The presence of electromagnetic fields altered the ERD/ERS responses in the 6-8 and 8-10 Hz frequency bands during mental processes requiring attention. The data do not, however, allow any conclusions concerning the possible effects of mobile phone use on cognition.