Browse 6,486 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing 250 studies (Rodent Studies) from Glaser RF/Microwave Archive
Chang-Zern Hong, David Harmon, Jen Yu · 1986
Researchers exposed rat tail nerves to static magnetic fields up to 1.2 Tesla and measured nerve function. While basic nerve conduction remained normal, nerve excitability increased significantly at field strengths above 0.5 Tesla when applied for more than 30 seconds. This suggests magnetic fields can alter how nerves respond to stimulation.
BLAKE S. WILSON et al. · 1980
Researchers exposed rats to microwave radiation and used radioactive glucose to map brain activity patterns. They discovered that continuous-wave microwaves triggered auditory responses in the brain at power levels as low as 2.5 mW/cm², even though these microwaves don't create audible sounds. The study proved these responses originated in the inner ear (cochlea), not from direct brain stimulation.
Guy, Arthur W., Wallace, Jack, McDougall, John A. · 1979
This 1979 study by Guy and colleagues developed a specialized waveguide system for exposing mice to 918 MHz and 2450 MHz microwave radiation in controlled laboratory conditions. The researchers designed equipment that could precisely deliver circularly polarized electromagnetic fields to groups of four mice at a time, with different positioning strategies for optimal exposure at each frequency. This work established technical methods for studying how microwave radiation affects biological systems like blood-brain barrier function and whole-body heating effects.
Kenji TAZAWA et al. · 1979
Japanese researchers tested radiofrequency therapy at 13.56 MHz on experimental tumors in rats, finding that local heating to 40-48°C for 20-30 minutes resulted in tumor regression and delay in tumor growth. The RF energy raised tumor temperatures 5-12°C above surrounding tissue, with complete tumor regression seen in 7 of 23 rats.
James P. Dilger et al. · 1979
Researchers exposed rats to 2450 MHz microwave radiation (the same frequency used in microwave ovens) and found the animals changed their heat-seeking behavior even when their core body temperature didn't change. The rats pressed a lever less frequently to turn on a warming lamp when exposed to microwaves, suggesting they were detecting internal heating that standard temperature measurements couldn't detect.
Carl H. Sutton, Frederick B. Carroll · 1979
This 1979 study examined how microwave radiation affects the blood-brain barrier in rats when combined with hyperthermia (elevated body temperature). The research investigated whether microwave-induced heating could compromise this critical protective barrier that normally prevents harmful substances from entering brain tissue.
James C. Lin, John C. Nelson, Merlin E. Ekstrom · 1979
Researchers exposed newborn mice to 148 MHz radio frequency radiation for one hour daily over 10 weeks, then monitored them for nearly two years. The study found no differences in blood parameters, body weight, or disease rates between exposed and control animals at the power levels tested.
Charles L. Sheridan et al. · 1979
This 1979 study exposed mice to near-lethal doses of 2450 MHz microwave radiation while in the womb and tracked their lifespan over three years. The research found that exposed mice actually developed fewer tumors than unexposed controls, though the difference was too small to be statistically meaningful. The study also discovered that intense microwave exposure causes dangerous overheating but animals cannot sense the radiation to escape it.
John R. Thomas, Linda S. Burch · 1979
Researchers exposed rats to low-level pulsed microwave radiation at an average power density of 1 milliwatt per square centimeter while giving them chlordiazepoxide, a minor tranquilizer. The microwave exposure made the drug's response-rate-increasing effects stronger, even though the radiation alone had no apparent impact on the rats' behavior.
S.M. Bawin, I. Sabbot, B. Bystrom, P.M. Sagan, W.R. Adey · 1979
Researchers exposed rats to 60 Hz electric fields at household power line frequencies for 30 days, testing field strengths from 50 to 1000 V/m. While most health measures showed no changes, rats exposed to the highest field strength (1000 V/m) showed altered sleep patterns and increased daytime activity. This suggests that power frequency fields at levels found near transmission lines may subtly affect circadian rhythms.
Robert P. Liburdy · 1979
Researchers exposed mice to 26 MHz radiofrequency radiation that raised their body temperature by 2°C, finding it caused a drop in immune cells and suppressed immune function. The radiation triggered stress hormone release and altered the distribution of immune cells throughout the body. This suggests RF radiation can weaken immune defenses through heat-related stress responses.
Jana Pazderová-Vejlupková, Marcel Josífko · 1979
This 1979 study exposed growing rats to pulsed microwave radiation at 2,736.5 MHz for 7 weeks and tracked blood changes. The radiation significantly reduced hematocrit levels, white blood cell counts, and lymphocyte numbers during exposure, with effects gradually reversing over 10 weeks after exposure ended. The study demonstrates that microwave radiation can measurably alter blood composition in developing animals.
Ohno, K., Pettigrew, K.D., Rapoport, S.I. · 1978
Researchers exposed rats to 2450 MHz microwave radiation (the same frequency used in microwave ovens and WiFi) for 30 minutes to test whether it damages the blood-brain barrier. They found no changes in the barrier's permeability to sucrose, suggesting this level of microwave exposure doesn't compromise brain protection.
Albert, E.N. · 1978
Researchers exposed rats and hamsters to microwave radiation at 2450 and 2800 MHz (similar to microwave ovens) for 2 hours and found it caused the blood-brain barrier to leak. The study revealed cellular damage including swollen brain cells, signs of nerve degeneration, and blood clots in small vessels.
Harry D. Muller · 1978
This 1978 study tested electromagnetic rodent control devices in poultry facilities and found they successfully reduced rat and mouse populations. The devices caused neurological dysfunction in rodents, leading to distorted eating patterns, lethargy, reduced reproduction, and eventually death. When the electromagnetic field was removed, surviving rodents recovered.
R.P. Liburdy · 1978
Scientists exposed mice to 2.5 GHz microwave radiation and found it dramatically altered how immune cells moved through the body. The radiation caused immune cells to get trapped in lungs, prevented them from reaching the spleen, and forced more cells into bone marrow than normal. This suggests microwave exposure disrupts the immune system's ability to function properly.
Unknown authors · 1978
Researchers exposed mice to 2.5 GHz microwave radiation at high intensity (30 mW/cm²) for 30 minutes, then tested whether their blood serum and immune cells could better fight cancer. The study found that serum and lymphocytes from microwave-exposed mice showed enhanced ability to destroy transplanted tumor cells. This suggests microwave exposure may boost certain immune system functions.
WIESLAW WIKTOR-JEDRZEJCZAK et al. · 1977
Researchers exposed mice to 2450 MHz microwave radiation for 30 minutes and found significant increases in specific immune cells in the spleen. The effect became even stronger with repeated exposures, suggesting microwave radiation can alter immune system function in mammals.
Kinn JB · 1977
This 1977 study measured how much 2450 MHz microwave radiation (the same frequency used in microwave ovens) was absorbed by rats and mice of different sizes. Researchers found that even animals of similar weight could absorb radiation at vastly different rates - up to seven times more in some cases than others.
Tikhonchuk VS · 1977
This 1977 Soviet research examined how mice recovered from microwave radiation exposure at 2400 MHz, the same frequency used in modern WiFi and microwave ovens. The study focused on biological recovery processes following microwave irradiation. This early research provides historical context for understanding how microwave frequencies affect living organisms.
T. A. Perumal, T. K. Bullard, C. Jayachandran · 1977
Researchers applied electric fields to immobilized rat legs for 6 hours daily over 21 days to test whether electrical stimulation could prevent bone loss from disuse. The study found that electric fields at 100-200 volts effectively reduced bone atrophy that normally occurs when limbs are immobilized, suggesting electrical stimulation may help maintain bone health.
R. H. Lenox, J. L. Meyerhoff, O. P. Gandhi, H. L. Wray · 1977
Researchers tested how microwave radiation affects brain chemistry in rats, specifically measuring cyclic AMP levels in different brain regions. They found that microwave exposure altered brain metabolism at different rates depending on the brain region, with the hypothalamus, cortex, and cerebellum responding differently. The study highlighted technical challenges in controlling microwave exposure parameters for consistent results.
Sol M. Michaelson, Ronnie Guillet, Franklin W. Heggeness · 1977
Researchers exposed pregnant rats to 2450 MHz microwave radiation (the same frequency used in microwave ovens and early WiFi) at power levels of 10-40 mW/cm² during different stages of pregnancy. The study investigated whether this prenatal microwave exposure would affect the functional development of the offspring, though the abstract cuts off before revealing the complete findings.
А. Д. Стржижковский, Г. В. Галактионова · 1976
Soviet researchers in 1976 studied the effects of prolonged magnetic field exposure on rodents, motivated by concerns about astronauts being exposed to magnetic radiation shielding during long space missions. The study examined both constant and alternating magnetic fields at approximately 1000 gauss strength over several days. This early research aimed to establish safety limits for magnetic protection systems in spacecraft.
Г. Д. Антимоний et al. · 1976
Soviet researchers in 1976 studied how extremely low frequency electromagnetic fields affected self-stimulation behavior in rats. This early research examined whether EMF exposure could alter reward-seeking behaviors in laboratory animals. The study contributes to understanding how electromagnetic fields might influence brain function and behavioral responses.