Study type: Medical/biological study (experimental study)

Differing effects of pulsed and CW microwave energy upon nerve function as detected by birefringence measurements med./bio.

By: Brown PVK, Larsen LE
Published in: IEEE Trans Microw Theory Tech 1980; 28 (10): 1126-1133
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Aim of study (acc. to editor)

To study peripheral nerve response to microwave (pulsed and continuous wave) radiation by birefringence measurement (an optical system).

Endpoint

Exposure

Exposure Parameters
Exposure 1:
  • unspecified
Modulation type: CW
Exposure duration: 23 min/nerve
Exposure 2:
  • unspecified
Modulation type: pulsed
Exposure duration: 23 min/nerve

Exposure 1

Main characteristics
Frequency
  • unspecified
Type
Exposure duration 23 min/nerve
Modulation
Modulation type CW
Exposure setup
Exposure source
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
power 5 W - measured - -

Exposure 2

Main characteristics
Frequency
  • unspecified
Type
Waveform
Exposure duration 23 min/nerve
Modulation
Modulation type pulsed
Pulse width 1 µs
Packets per second 1,000
Exposure setup
Exposure source
Sham exposure A sham exposure was conducted.
Parameters
Measurand Value Type Method Mass Remarks
power 5 kW peak value measured - -

Exposed system:

Methods Endpoint/measurement parameters/methodology

Investigated system:
Time of investigation:
  • during exposure

Main outcome of study (acc. to author)

Pulsed microwave energy affects nerve function more than energy of continuous wave of the same power average. The rate of degradation of birefringence amplitude is greater for pulsed waves than for continuous wave energy. Heating the nerve gives results similar to the exposure to continuous wave energy.

Study character:

Study funded by

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