Study type: Medical/biological study (experimental study)

The effects of electromagnetic field emitted by GSM phones on working memory. med./bio.

Published in: Neuroreport 2000; 11 (8): 1641-1643

Aim of study (acc. to author)

To study the influence of pulsed radiofrequency electromagnetic fields of digital GSM mobile phones on working memory in healthy subjects.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 902 MHz
Modulation type: pulsed
Exposure duration: continuous for about 30 min

Exposure 1

Main characteristics
Frequency 902 MHz
Type
Exposure duration continuous for about 30 min
Modulation
Modulation type pulsed
Pulse width 577 µs
Repetition frequency 217 Hz
Exposure setup
Exposure source
Distance between exposed object and exposure source 4 cm
Setup The mobile phone was mounted on the left side of the subject's head in normal position for use. The antenna was located about 4 cm apart from the head, over the posterior areas of the left temporal lobe. The RF power was switched on and off via a data cable from a laptop.
Additional info Each subject was tested twice within a single session, with and without RF exposure.
Parameters
Measurand Value Type Method Mass Remarks
power 0.25 W mean - - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • during exposure

Main outcome of study (acc. to author)

The radiofrequency field speeded up response times when three items had to be kept in memory but no effects of radiofrequency were revealed with lower loads. The data suggest that radiofrequency fields have a measurable effect on human brain function and cognition.

Study character:

Study funded by

Related articles