Study type: Medical/biological study (experimental study)

[On the effects of low intensity, pulsed electromagnetic fields on memory and cognition performance,] med./bio.

Zur Wirkung gepulster elektromagnetischer Felder geringer Leistungen auf Gedächtnisprozesse.

Published in: Z Med Phys 2004; 14 (2): 105-112

Aim of study (acc. to author)

To examine effects of exposure to pulsed electromagnetic fields on cognitive performance of 33 subjects.

Background/further details

A psycho-physiological test paradigm (auditory discrimination task; determination of auditory order threshold (OT)) was used. Subjects had to decide on which side the first of two succeeding stimuli was presented. Inter-stimulus-intervals (ISI) were gradually reduced as long as no mistakes occured; wrong responses led to expansion of the ISI.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 900 MHz
Modulation type: pulsed
Exposure duration: continuous for 30 min

Exposure 1

Main characteristics
Frequency 900 MHz
Type
Charakteristic
Exposure duration continuous for 30 min
Modulation
Modulation type pulsed
Repetition frequency 217 Hz
Exposure setup
Exposure source
Chamber Acoustically shielded room.
Setup During the exposure the subjects relaxed on a stretcher.
Additional info Double blind experiments were performed. Each test person participated in the experiment twice (on separate days), once with and once without exposure.
Parameters
Measurand Value Type Method Mass Remarks
power density 10 mW/m² unspecified measured - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Investigated organ system:
Time of investigation:
  • before exposure
  • after exposure

Main outcome of study (acc. to author)

Exposure to pulsed fields resulted in reduced mental-regeneration performance in 21 of the 33 subjects, as reflected by an increase of order threshold.

Study character:

Study funded by

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