Study type: Medical/biological study (experimental study)

Static magnetic fields increase the power intensity of EEG of man med./bio.

By: von Klitzing L
Published in: Brain Res 1989; 483 (1): 201-203
Download citation in RIS format

Aim of study (acc. to author)

To assess possible hazardous effects in man from strong magnetic fields used clinically in diagnostic NMR-equipment.

Endpoint

Exposure

Exposure Parameters
Exposure 1:

Exposure 1

Main characteristics
Frequency
Type
Additional info Static magnetic field.
Exposure setup
Exposure source
  • resistive whole body magnet used in NMR equipment.
Parameters
Measurand Value Type Method Mass Remarks
magnetic flux density 200 mT maximum measured - -
Additional parameter details

When the magnet was switched off the magnetic field decay to values lower than 0.1 mT within less than 10 s. The magnetic field from 0 to 0.7 mT was available within less than 1 min.

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • during exposure

Main outcome of study (acc. to author)

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.

Study character:

Study funded by

Related articles