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Effects of Electromagnetic Radiations on Physiologic Responses

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Sol M. Michaelson, D.V.M., R. A. E. Thomson, M.T. and William J. Quinlan, Jr., B. S. · 1967

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1967 dog study found 1240 MHz microwaves caused heart, lung, and blood changes suggesting compromised biological defenses.

Plain English Summary

Summary written for general audiences

Researchers exposed dogs to 1240 MHz pulsed microwaves at 50 mW/cm² for six hours daily over five days, finding significant changes in heart, lung, thyroid, and blood cell functions. Dogs previously exposed to X-rays showed even greater sensitivity to the microwave radiation. The scientists concluded these functional changes, if extrapolated to humans, would indicate compromised protective capabilities and homeostatic insufficiency.

Why This Matters

This 1967 study represents early recognition that microwave radiation at levels comparable to today's wireless devices can disrupt fundamental biological processes. The 50 mW/cm² exposure level used here is roughly 500 times higher than typical cell phone emissions, yet the researchers observed measurable physiological changes across multiple organ systems without obvious tissue damage. What's particularly concerning is that dogs with prior radiation exposure showed heightened sensitivity, suggesting cumulative effects. The finding that microwave exposure compromised the animals' "protective capability" and "homeostatic insufficiency" points to systemic vulnerability that could manifest as increased susceptibility to other health challenges. While this research predates our wireless age by decades, it established that non-ionizing radiation at sufficient intensities can trigger cascading biological effects beyond simple heating.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Sol M. Michaelson, D.V.M., R. A. E. Thomson, M.T. and William J. Quinlan, Jr., B. S. (1967). Effects of Electromagnetic Radiations on Physiologic Responses.
Show BibTeX
@article{effects_of_electromagnetic_radiations_on_physiologic_responses_g3757,
  author = {Sol M. Michaelson and D.V.M. and R. A. E. Thomson and M.T. and William J. Quinlan and Jr. and B. S.},
  title = {Effects of Electromagnetic Radiations on Physiologic Responses},
  year = {1967},
  
  
}

Quick Questions About This Study

Researchers exposed dogs to 1240 MHz pulsed microwaves at 50 mW/cm² for six hours daily over five consecutive days. This power density is significantly higher than typical consumer wireless device emissions.
Dogs previously irradiated with X-rays showed greater sensitivity to subsequent microwave exposure, suggesting prior radiation damage made them more vulnerable to additional electromagnetic stress and cumulative biological effects.
The study documented alterations in cardiopulmonary (heart and lung), thyroid, and erythropoietic (blood cell production) functions, indicating widespread physiological impacts across multiple biological systems.
No overt pathologic alterations were observed, meaning there was no visible tissue damage. However, functional changes occurred that researchers said indicated compromised protective capability and homeostatic insufficiency.
Homeostatic insufficiency means the body's ability to maintain stable internal conditions is compromised. Researchers suggested if these dog findings applied to humans, it would indicate reduced protective capabilities against health challenges.