ELECTROENCEPHALOGRAPHIC AND MORPHOLOGICAL INVESTIGATIONS ON THE INFLUENCE OF MICROWAVES ON THE CENTRAL NERVOUS SYSTEM
STANISLAW BARANSKI, ZBIGNIEW EDELWEJN · 1967
Chronic microwave exposure caused brain changes in rabbits without heating tissue, with pulsed signals more harmful than continuous waves.
Plain English Summary
Polish researchers exposed 70 male rabbits to microwave radiation for 60 days, measuring brain wave activity and examining brain tissue under microscopes. They found that chronic microwave exposure at power levels that didn't heat the tissue still caused measurable changes in brain function and structure. Pulsed microwaves produced more pronounced effects than continuous waves.
Why This Matters
This 1967 study represents some of the earliest scientific evidence that microwave radiation can affect the nervous system through non-thermal mechanisms. The researchers used power densities of 7 mW/cm² - levels comparable to what you might experience standing near a microwave oven or base station. What makes this particularly significant is that the effects occurred without any temperature increase, challenging the industry's long-held position that heating is the only biological mechanism of concern.
The finding that pulsed microwaves caused more pronounced brain changes than continuous waves has profound implications for today's wireless world. Modern cell phones, WiFi routers, and 5G networks all use pulsed signals. While this study used rabbits rather than humans, the basic neurological structures and responses are remarkably similar across mammalian species. The science demonstrates that our brains may be more vulnerable to wireless radiation than regulatory agencies acknowledge.
Finding
Chronic irradiation within the 10 cm band and 7 mW per sq. cm power density, which did not raise the temperature, produced both functional and morphological changes, their intensity being greater when pulse and not continuous modulation was applied. The absence of a major effect of a single ir- radiation was stated. The changes seem to be associated with the extra- thermic action of microwaves.
In their words
“Chronic irradiation within the 10 cm band and 7 mW per sq. cm power density, which did not raise the temperature, produced both functional and morphological changes, their intensity being greater when pulse and not continuous modulation was applied. The absence of a major effect of a single ir- radiation was stated. The changes seem to be associated with the extra- thermic action of microwaves.”
Figures from the Original Paper
Diagrams extracted from the original research document.
Exposure Information
Specific exposure levels were not quantified in this study.
Show BibTeX
@article{electroencephalographic_and_morphological_investigations_on_the_influence_of_mic_g6821,
author = {STANISLAW BARANSKI and ZBIGNIEW EDELWEJN},
title = {ELECTROENCEPHALOGRAPHIC AND MORPHOLOGICAL INVESTIGATIONS ON THE INFLUENCE OF MICROWAVES ON THE CENTRAL NERVOUS SYSTEM},
year = {1967},
}