Study type: Medical/biological study (experimental study)

Studies of long-term exposure of the porcine brain to radiation from two-way portable radios med./bio.

Published in: J Microw Power 1982; 17 (4): 280-281

Aim of study (acc. to editor)

To study the effects of long-term exposure to two-way portable radios on the porcine brain.



Exposure Parameters
Exposure 1: 452 MHz
Modulation type: CW
Exposure duration: repeated daily intermittent exposure, 1 min on/9 min off cycles, 8 h/day for 90 days
  • power: 6.4 W unspecified (maximum power available for the device)

General information

Animals were divided into 8 experimental and 7 control animals

Exposure 1

Main characteristics
Frequency 452 MHz
Exposure duration repeated daily intermittent exposure, 1 min on/9 min off cycles, 8 h/day for 90 days
Modulation type CW
Exposure setup
Exposure source
  • two way portable radio (Motorola, Model MX 350)
Distance between exposed object and exposure source 0.015 m
Setup Animals were fitted with a leather harness holding a lexan container, holding a two way radio, in contact with frontal scalp. Two way radio in the container was held in such a way that the antenna remained at a distance of 1.5 cm from the frontal midline of the scalp.
Measurand Value Type Method Mass Remarks
power 6.4 W unspecified unspecified - maximum power available for the device

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

The studies of the integrity of blood-brain barrier and brain tissue elements (as demonstrated with sensitive neurohistological special stains and with even more sensitive histochemical preparations) failed to detect any evidence of injury to brain tissue in the exposed group or in the non-exposed control group. The authors conclude that repeated daily exposure at 452 MHz does not produce detectable brain injury in pigs. It is unlikely that similar usage of two-way portable radios in humans will produce any brain injury or blood-brain barrier disruption.

Study character:

Study funded by