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To assess possible hazardous effects in man from strong magnetic fields used clinically in diagnostic NMR-equipment.
In static magnetic fields the power values of EEG are increased. The influence is different in the two cortical hemispheres and not the same for all EEG-frequencies. The increased control values following an inverted magnetic flux vector have a higher energy than the control before and point to a - reversible - change of brain function induced by a static magnetic field.