Study type: Medical/biological study (experimental study)

The relationship between flash evoked potentials and evoked amplitude modulation patterns of an applied UHF electromagnetic field in the rat. med./bio.

Published in: Bioelectromagnetics 1984; 5 (4): 365-375

Aim of study (acc. to author)

To investigate whether a reciprocal relationship in the interaction of ultrahigh frequency (UHF) electromagnetic field with CNS exists.

Background/further details

That is, would a continuous wave, nonmodulated UHF electromagnetic field, when applied to electrically rhythmic CNS tissue, develop a dynamic variation in field amplitude in the vicinity of the tissue which would correspond to the electrophysiological frequencies (or waveforms) of the tissue. If such an amplitude modulation effect occurs, it would be an alternative method for recording electrophysiological activity. The relationship between flash evoked potentials and evoked amplitude modulation patterns of an applied UHF electromagnetic field was studied.

Endpoint

Exposure

Exposure Parameters
Exposure 1: 500 MHz
Modulation type: CW

Exposure 1

Main characteristics
Frequency 500 MHz
Type
Waveform
Modulation
Modulation type CW
Exposure setup
Exposure source
Chamber electrically shielded cage
Additional info the active coil was placed on top of skull
Parameters
Measurand Value Type Method Mass Remarks
power density 10 W/m² unspecified estimated - at the animal's head

Exposed system:

Methods Endpoint/measurement parameters/methodology

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

Main outcome of study (acc. to author)

Patterns of amplitude modulation of an applied UHF electromagnetic field, when recorded and averaged, show strong correlations with simultaneously recorded evoked potentials. The results support the hypothesis that the UHF electromagnetic field amplitude is altered in a dynamic fashion by the tissue's electrophysiological processes that are involved with the generation of CNS electric fields.

Study character:

Study funded by

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