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
Scott N. Ackerman et al.
Researchers exposed rat adrenal gland tissue to 60 Hz electric fields at 45 kV/m and higher intensities, measuring how the tissue's hormone production (corticosterone) responded. The study examined both isolated tissue samples and whole animals to understand how power line frequency fields affect stress hormone systems.
Unknown authors
Researchers trained rats to perform precise timing tasks, then exposed them to 2.8 GHz pulsed microwaves at power levels similar to early cell phones. The microwave radiation disrupted the animals' ability to maintain accurate timing behavior, with stronger effects at higher power levels. Importantly, the same radiation had no effect when the timing task was made easier, suggesting the microwaves specifically interfere with complex behavioral control.
Unknown authors
Researchers trained rats to perform timing tasks requiring precise 18-24 second intervals between lever presses for food rewards. When exposed to low-level microwave radiation (2.45 GHz pulsed at 1-5 mW/cm²), the sedative drug pentobarbital became significantly more potent, requiring 40% lower doses to produce the same behavioral effects. This demonstrates that microwave exposure can amplify drug effects in the brain.
Unknown authors
Researchers exposed 24 pregnant rats to 2450 MHz microwave radiation (the same frequency as microwave ovens) for 8 hours daily throughout pregnancy at power levels that didn't raise body temperature. They found no significant effects on fetal development, birth outcomes, or behavioral development in offspring through two generations.
Unknown authors
Researchers exposed rats to intense 918 MHz microwave radiation for 30 minutes to see if it would help antibodies cross the blood-brain barrier to fight infections. The microwaves raised body temperature to dangerous levels but failed to allow antibodies into the cerebrospinal fluid. The study found no evidence that microwave exposure could breach the brain's protective barriers.
Unknown authors
Researchers exposed rats to strong 60 Hz electric fields (100 kV/m) for up to 30 days to test effects on reproduction and development. The study found no impacts on mating behavior, fertility, fetal development, or sperm quality. This suggests that extremely low frequency electric fields at these levels may not significantly harm reproductive health in mammals.
Unknown authors
Researchers exposed pregnant mice to microwave radiation at 2450 MHz (the same frequency as microwave ovens and WiFi) for 3 hours daily during critical brain development periods. They then tested the newborn pups for basic reflexes and neurological development from birth through 21 days old. The study aimed to understand whether low-level prenatal microwave exposure affects behavioral development in offspring.
Unknown authors
Researchers exposed mice to 2450 MHz microwave radiation (similar to microwave ovens) for up to 4 months, then treated them with cancer-causing chemicals to see if the radiation affected tumor development. The study examined whether long-term microwave exposure changes immune system function in ways that could influence cancer risk.
Unknown authors
Scientists measured brain temperatures in awake rats exposed to 2450 MHz microwave radiation at 65 mW/cm² for 30 or 90 minutes. They tracked temperatures in four specific brain regions (cortex, hypothalamus, cerebellum, and medulla) plus colon temperature to understand how microwaves affect brain heating. This research aimed to clarify whether microwave-induced blood-brain barrier changes are linked to temperature increases.
Unknown authors
Scientists exposed young rats to pulsed microwave radiation at 24.4 mW/cm² for seven weeks and adult rats at 1 mW/cm² for 14 weeks to study effects on blood cells. At the higher power level (24.4 mW/cm²), leucocyte and absolute lymphocyte counts dropped significantly during the second half of exposure. At the lower power level (1 mW/cm²), no significant changes in lymphocyte counts occurred.
Unknown authors
This study examined the effects of 2450 MHz microwave radiation on testicular cells and sperm development in laboratory mice. Researchers analyzed cellular changes in reproductive tissue following microwave exposure. The study appears to have found no significant effects on testicular function or sperm production.
Unknown authors
Researchers exposed rats to 2.45 GHz microwave radiation at 40 mW/cm² for 2 hours, with some rats also receiving thyroid hormone injections to increase their metabolic rate. The study found that microwave exposure significantly increased stress hormone (corticosterone) levels and disrupted thyroid function, with effects amplified when combined with elevated metabolism.
A. DEFICIS, J.C. DUMAS, S. LAURENS
This conference paper examined biological changes in Swiss mice exposed to microwave radiation, focusing on effects to nervous system function and immune responses. The research investigated how microwave irradiation altered normal biological processes, including nerve conduction and immune system activity. This type of foundational research helps establish the biological mechanisms through which microwave radiation affects living systems.
Unknown authors
Researchers exposed mice to 2450 MHz microwave radiation (the same frequency used in microwave ovens and WiFi) and found it significantly increased immune cells in their spleens. Even a brief 15-minute exposure triggered measurable immune system changes, with effects peaking after 45 minutes of exposure.
Unknown authors
Researchers exposed pregnant rats and their offspring to 100-MHz radiofrequency radiation for 4 hours daily throughout pregnancy and early development. While most health measures remained normal, the study found significant changes in brain acetylcholinesterase activity, an enzyme crucial for nerve function. This suggests that chronic RF exposure during critical development periods may affect brain chemistry even when other health indicators appear unaffected.
Unknown authors
Researchers measured how much radiofrequency radiation is absorbed by mice and rats when exposed to three different frequencies: 2450 MHz (microwave oven frequency), 425 MHz, and 100 MHz. They used precise calorimetry techniques to determine specific absorption rates (SAR) - essentially how much energy the animals' bodies absorbed from the radiation. The study compared actual measurements with theoretical predictions across different animal sizes and orientations.
Unknown authors
Researchers exposed female mice to 425 MHz radio frequency radiation for one hour daily over five days, testing both continuous and pulsed wave signals at various power levels. The study found no effects on the mice's primary immune response to sheep red blood cells, as measured by antibody-producing cell counts.
Unknown authors
Researchers exposed three rats to pulsed 2800 MHz microwave radiation for 30 minutes before testing their ability to learn new sequences of behaviors. At higher power levels (5-10 mW/cm²), the microwaves disrupted the rats' learning performance, causing more errors and slower completion of tasks: in two of four replications at 5 mW/cm² and in all replications at 10 mW/cm². At 0.25, 0.5 and 1.0 mW/cm² the behavioral measures were generally within the control range.
Unknown authors
Researchers exposed pregnant rats to 2450 MHz microwave radiation (the same frequency used in microwave ovens and some WiFi) for 20 minutes at 31 or 17 mW/g to study birth defects. Resorptions and abnormalities increased at 31 mW/g, the condition in which five of the six dams that died were exposed. Fetal body mass was decreased at 31 mW/g, while fetal brain mass fluctuated with treatment and the day of gestation.
Unknown authors
This technical report examined the effects of 2.45 GHz microwave radiation exposure on pregnant mice, focusing on potential developmental impacts during pregnancy. The research investigated whether microwave radiation at this frequency could cause birth defects or other reproductive harm. This frequency is commonly used in microwave ovens and some wireless devices, making the findings relevant to human exposure concerns.
Unknown authors
Researchers exposed rats to 2.45 GHz microwave radiation (the same frequency used in microwave ovens and WiFi) at various power levels for 4 hours and measured stress hormone levels. They found a surprising dual effect: low-level exposures actually suppressed the normal rise in corticosterone (stress hormone), while high-level exposures dramatically increased it. This suggests microwave radiation can disrupt the body's natural stress response system in complex ways.
H. Lai, A. Horita, A.W. Guy
Researchers exposed rats to 2450-MHz microwave radiation for 45 minutes at low power levels (0.6 W/kg) and measured effects on brain neurotransmitter systems. They found that microwave exposure disrupted choline uptake in multiple brain regions, with different effects depending on whether the radiation was continuous or pulsed.
Phillips, Richard D., Hunt, Evans L., King, Nancy W.
Researchers exposed rats to 2450 MHz microwave radiation (the same frequency used in microwave ovens and some WiFi) for 30 minutes at different power levels. They found that even moderate exposure levels caused temperature changes, slowed heart rate, and reduced metabolism for hours after exposure ended. The effects were dose-dependent, meaning higher power levels caused more severe and longer-lasting physiological disruptions.
Stern
This research by Stern examined how microwave radiation at 2450 MHz affects temperature regulation behavior in laboratory rats. The study found that microwave exposure altered how rats naturally respond to temperature changes, suggesting these electromagnetic fields can disrupt biological processes that control body temperature. This matters because it demonstrates microwaves can affect fundamental biological functions beyond just heating tissue.
L. MIRO, R. LOUBIERE, A. PFISTER
This French research study examined internal organs and reproduction in mice and rats exposed to pulse-modulated ultra-short waves at 3105 MHz, with modulation chosen to avoid heating. It reported no characteristic visceral lesions (tissue damage to internal organs) and no pathological change in reproduction. The only finding noted was slightly enlarged, congested spleens, which the authors link to a possible excitation of the reticulo-histiocytic system.