Browse 8,655 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing 287 studies (Rodent Studies) from Glaser RF/Microwave Archive
Nancy Williams King · 1969
This 1969 study exposed rats to 2450 MHz microwave radiation (the same frequency used in microwave ovens) while they performed behavioral tasks involving tongue-licking responses. The researchers found that the microwave exposure affected the rats' ability to perform learned behaviors, even at levels considered 'safe' by 1960s standards.
LESZEK CIECIURA et al. · 1969
This 1969 Polish research examined how microwave radiation affects nerve function in white rats, with particular attention to the pineal gland's ultrastructure. The study represents early scientific investigation into microwave effects on neurological systems, decades before widespread consumer wireless technology. This foundational research helped establish that microwave exposure can produce measurable changes in nervous system function.
LESZEK CIECIURA et al. · 1969
Polish researchers in 1969 examined how microwave radiation affects the pineal gland structure in white rats using electron microscopy. The pineal gland produces melatonin, which regulates sleep cycles and other biological functions. This early study investigated whether microwave exposure could damage this critical brain structure at the cellular level.
A. M. Roberts · 1969
This 1969 study by Roberts examined the effects of electric fields on mice, though specific details about exposure conditions and measured outcomes are not available in the provided information. The research represents early work investigating how electromagnetic fields might affect biological systems in laboratory animals.
Freeman W. Cope · 1969
Researchers used deuterium (heavy water) as a molecular probe to study water organization in rat muscle and brain tissue. They found that tissue water behaves dramatically differently from regular liquid water, with much faster relaxation times indicating highly structured, organized water arrangements. This suggests that biological water exists in organized states rather than random liquid form.
R. A. CHIZHENKOVA · 1969
This 1969 study examined how ultra-high frequency electromagnetic fields affected brain activity in rabbit visual cortex neurons. The research found that EMF exposure altered the electrical activity patterns of brain cells responsible for processing visual information. This was one of the earliest studies to document direct effects of radiofrequency radiation on mammalian brain function.
Willard E. Caldwell, Earl Gaddis, Morton Werber · 1969
This 1969 study by Caldwell described the development of an operant electromagnetic chamber designed to expose small mammals to radio-frequency radiation while monitoring their behavior. The research focused on creating controlled experimental conditions to study how RF electromagnetic fields might influence animal behavior through operant conditioning techniques.
LESZEK CIECIURA et al. · 1969
This 1969 study examined how microwave radiation affected the microscopic structure of pineal glands in laboratory rats. The research focused on the pineal gland, which produces melatonin and regulates sleep cycles. This represents early evidence that microwave exposure can cause observable changes to brain tissue structure.
Z. V. Gordon et al. · 1969
Soviet researchers exposed albino rats to millimeter wave radiation and found it weakened their nervous system function, altered blood pressure, and caused structural changes in their brains. This 1969 study was among the first to show that millimeter waves, which are absorbed primarily by surface tissues, can still affect deep internal organs. The findings suggest these frequencies may have different biological effects compared to longer wavelengths.
Stephen Herrero · 1969
Researchers used radiofrequency current to create precise brain lesions in female rats' ventromedial hypothalamus, finding that RF lesions caused identical effects to direct current lesions. All 15 rats with RF-induced brain damage developed obesity, along with disrupted hormone cycles, reduced activity, and increased water consumption. This 1969 study demonstrates that radiofrequency energy can cause permanent, measurable brain damage in living tissue.
Raymond Pautrizel et al. · 1969
This 1969 French study investigated whether electromagnetic fields and magnetic fields could boost immune defenses in mice and rats infected with trypanosoma parasites. The research explored using physical stimulation methods to enhance the animals' natural ability to fight off these parasitic infections. This represents early scientific interest in how electromagnetic exposures might influence immune system function.
L.P. Boginin et al. · 1969
This 1969 Soviet research examined how alternating magnetic fields affect lymphoid tissue (immune system components) in rodents, focusing on changes to lymphoblasts and immune cell structures. The study represents early investigation into electromagnetic field effects on immune function, though specific exposure details and findings are not available from the limited documentation.
V. M. Koldaev · 1969
Soviet researchers in 1969 studied how rats' survival rates in ultrahigh-frequency electromagnetic fields depend on their tissue oxidation levels. They found that animals with altered oxygen metabolism showed different resistance to EMF exposure. This early study suggested that cellular energy processes may determine how organisms respond to electromagnetic radiation.
Barnothy · 1969
Researchers exposed mice to strong magnetic fields (3,000-10,000 oersted) and found significant organ changes that resembled stress responses. The study suggests magnetic fields may act as environmental stressors, triggering an initial alarm reaction followed by biological adaptation. This early research helped establish that magnetic field exposure can produce measurable physiological effects in living organisms.
John S. Krebs · 1968
This 1968 study exposed male mice to X-ray and neutron radiation to understand how ionizing radiation damages reproductive tissue. Researchers found that testicular tissue loss followed a predictable pattern, with neutrons being nearly 4 times more damaging than X-rays, and identified that germinal cells (sperm-producing cells) were the primary target of radiation damage.
J. T. Cummins, B. E. Vaughan, R. L. Persotti · 1968
Researchers exposed rat stomach tissue to electrical currents at frequencies from 10 to 1,000 Hz and found that both alternating and square wave currents caused the stomach lining to depolarize (lose its electrical charge). While acid production remained normal, the electrical properties of the stomach tissue changed significantly, suggesting direct effects on cellular membranes.
Unknown authors · 1968
This 1968 Soviet research examined how microwave radiation affects blood cell production in laboratory rodents. The study focused on changes to red blood cells (erythrocytes) and white blood cells (leukocytes) following microwave exposure. This represents early scientific recognition that microwave frequencies could disrupt the body's blood-forming systems.
Shneyvas, V. B., Zufarov, K. A. · 1968
This 1968 electron microscope study exposed white mice to electromagnetic fields from medical diathermy equipment at 1625 kHz and 39 MHz frequencies. Researchers found significant cellular damage in liver cells, including broken nuclear membranes, disrupted mitochondria, and other structural changes. The study demonstrated that EMF exposure causes biological effects even without heating tissue.
F. G. Hirsch, D. R. McGrann, T. D. Hamish · 1968
This 1968 study examined how high-density pulsed electromagnetic fields affected psychological and behavioral responses in laboratory rodents, including maze learning performance. The research represents early scientific recognition that electromagnetic energy exposure could influence brain function and behavior, not just physical tissue heating.
JAMES H. McELHANEY, RICHARD STALNAKER, ROBERT BULLARD · 1968
Researchers applied electric fields to immobilized rat legs for 28 days to test whether electrical stimulation could prevent bone loss from disuse. The electric field treatments successfully reduced bone weight loss and cortical area reduction compared to untreated controls. However, 8 bone tumors developed in the 18 treated femurs, while no tumors appeared in the control group.
F. G. Hirsch, D. R. McGiboney, T. D. Harnish · 1968
This 1968 study by F.G. Hirsch examined how high-density pulsed electromagnetic energy affected psychological behavior in laboratory rats, specifically focusing on maze performance. The research represents early scientific investigation into whether electromagnetic fields could influence brain function and behavior patterns. This work helped establish the foundation for understanding potential neurological effects of EMF exposure decades before widespread wireless technology adoption.
Unknown authors · 1968
This 1968 Soviet study examined how microwave electromagnetic radiation affects blood cell production (hematopoiesis) in laboratory rodents. The research represents early experimental work investigating potential biological effects of microwave exposure on the body's blood-forming system. This type of foundational research helped establish the scientific basis for understanding EMF health effects.
LOBANOVA EA · 1968
This 1968 Soviet study examined how periodic microwave exposure affects mice, focusing on standardizing exposure protocols for safety research. The researchers investigated reflex responses and radiation effects to help establish maximum permissible exposure levels. This represents early foundational work in microwave safety standards development.
S. V. Nikogosyan, I. A. Kitsovskaya · 1968
Soviet researchers exposed rats to decimeter wave radiation (110 mW/cm²) for 60 minutes daily and found it decreased cholinesterase activity in the brain. Rats that were already sensitive to noise showed the most dramatic changes, suggesting pre-existing nervous system conditions may amplify EMF effects.
J. Pokorny, V. Jelinek · 1967
Researchers exposed mice with transplanted tumors to magnetic and electromagnetic fields of varying intensities. Certain field arrangements significantly slowed tumor growth and extended survival times in the treated animals. This 1967 study suggests specific EMF configurations may have therapeutic anti-cancer effects.