The mobile phone was positioned at a distance of 40 cm from the vertex of the subject, comparable to normal use, and operated from an adjacent room.
Additional info
For each subject the EEG was registered in two 10 min duration periods separated by a 30 min break. Each EEG registration was subdivided into three successive segments, each consisting of 80 sweeps at 2.55 s duration. The first and the third segments served as controls during which the EMF was switched off. EMF was active during the second segment during one registration session and inactive during the other (randomized, single-blind).
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