SKIN AND SUBCUTANEOUS TEMPERATURE CHANGES DURING EXPOSURE TO INTENSE THERMAL RADIATION
J.A.J. Stolwijk, J.D. Hardy · 1964
This 1965 research documented measurable tissue heating from electromagnetic radiation, establishing early evidence of biological EMF effects.
Plain English Summary
This 1965 technical report examined how intense thermal radiation affects skin and deeper tissue temperatures in humans. The research measured temperature changes at different tissue depths during thermal radiation exposure. This early work helped establish baseline understanding of how electromagnetic energy transfers heat into human tissue.
Why This Matters
While this 1965 research focused on thermal radiation rather than modern EMF sources, it represents foundational work in understanding how electromagnetic energy interacts with human tissue. The science demonstrates that electromagnetic fields can produce measurable biological effects through heating mechanisms. What this means for you is that thermal effects from EMF exposure have been documented for decades, even before the wireless revolution. Today's cell phones, WiFi routers, and other devices operate at power levels generally considered too low to cause significant heating, but this early research reminds us that electromagnetic energy does interact with our bodies in measurable ways. The reality is that understanding thermal mechanisms helped scientists later distinguish between heating effects and the non-thermal biological effects that remain more controversial in modern EMF health debates.
Exposure Information
Specific exposure levels were not quantified in this study. Duration: 2-120 seconds
Study Details
To measure skin temperature changes during exposure to intense thermal radiation and compare experimental values with theoretical calculations using finite differences method for various skin layers.
A lamp bank was constructed consisting of 8 quartz lamps 40 cm long mounted horizontally and spaced ...
Measurements were made on several subjects at room temperatures near 20°C. For the first 10-15 secon...
During the initial 10-15 sec of irradiation theoretical and experimental values are in agreement, indicating passive responses. For longer exposures, it is concluded that physiological responses such as vasodilation and sweating slow the skin temperature rise. Subcutaneous temperatures can be calculated from surface temperature data; it is indicated that most of the radiation is absorbed in the first 0.05 - 0.15 mm of skin through combined effects of absorption and scattering. Some of the radiation of wavelength near 1μ penetrates to a depth of 5 mm or more.
Show BibTeX
@article{skin_and_subcutaneous_temperature_changes_during_exposure_to_intense_thermal_rad_g4779,
author = {J.A.J. Stolwijk and J.D. Hardy},
title = {SKIN AND SUBCUTANEOUS TEMPERATURE CHANGES DURING EXPOSURE TO INTENSE THERMAL RADIATION},
year = {1964},
}