Browse 6,486 peer-reviewed studies on electromagnetic field health effects from 4 research libraries.
Showing 2,030 studies in Brain & Nervous System
Unknown authors · 2023
Rats exposed to jammer device showed dysfunction in short- and long-term memory, which shown the unfavorable effect of jammer on memory and learning. Our results indicated that the distance from radiation source was more important than the duration.
Unknown authors · 2023
Twenty-one healthy volunteers were exposed to a GSM signal at 900 MHz with specific absorption rates of 0.49 W/kg (10 g tissue) and 0.70 W/kg (1 g tissue). Delta and beta rhythms of resting EEG were not affected by the exposure. Theta brainwaves were significantly modulated during exposure, and this modulation depended on whether eyes were closed or open.
Varshney S, Angral S, Aggarwal P et al. · 2023
Researchers conducted a cross-sectional study of 865 adults aged 18 to 45 years who had used mobile phones for more than two years. Mean daily mobile phone use was 85.94 minutes, ranging from 4 to 900 minutes per day. No significant differences were found between dominant and non-dominant ears for wave amplitudes, latencies, or interpeak latencies overall. However, interpeak latency I-V was significantly prolonged with daily use over 180 minutes, use of 0 to 4 years, and cumulative use over 1500 hours. Mean interpeak latencies increased with years of mobile phone use and were highest in users with more than 12 years of use.
Unknown authors · 2023
The study included 32 healthy participants in a double-blinded crossover counterbalanced design. EEG recordings were taken from 63 electrodes across 6 brain regions during two 18-minute sessions with alternating eyes-open and eyes-closed blocks. Bayesian analysis provided statistical evidence for an EMF effect on alpha band power density in the eyes-open condition.
Salari M et al. · 2023
Researchers tested the effects of ketamine and extremely low-frequency electromagnetic fields on depression-like behavior and on learning and memory. They also measured expression of GFAP, caspase-3, p53, BDNF, and NMDA receptor in animals subjected to chronic unpredictable stress.
Unknown authors · 2023
Zebra finches trained in a four-arm maze to orient using the magnetic field became disoriented when tested in low-level (~10 nT) Larmor-frequency RF fields. When the same birds were trained under the RF field, they could orient, showing the field altered but did not remove magnetic input. Higher-intensity Larmor-frequency RF fields dramatically changed the compass response, while broadband RF fields during training or testing erased magnetic compass information.
Unknown authors · 2023
Researchers exposed 28 Wistar Albino rats to 900, 1800, and 2100 MHz radiofrequency radiation for 3 hours per day over one month. The greatest effect was seen at 1800 MHz in the right lobe and at 2100 MHz in the left lobe.
Unknown authors · 2023
Unknown authors · 2023
Researchers exposed mice continuously for 16 weeks to 2.45 GHz RF radiation from a household Wi-Fi router and a laboratory device, comparing them to a sham-exposed group. Mice underwent behavioral tests including open-field and Y-maze before and after exposure, and brains were examined for histopathology and DNA methylation. Exposure increased locomotor activity but did not produce significant structural or morphological brain changes. Global DNA methylation was lower in exposed mice than in sham mice.
Unknown authors · 2023
Unknown authors · 2023
CT irradiation had gross effects on platelets, white blood cell counts, memory, hepatic and testicular histoarchitectures compared to the 5 GHz-only group. The 5 GHz-only group showed loss of p53 (exons 5–7) gene bands and increased micronucleated polychromatic erythrocyte count.
Khayat S, Fanaei H, Lakzaee N · 2023
Pregnant Wistar rats were randomly assigned to RF radiation exposure or no exposure, and their male offspring were later allocated to sham, exposure-only, hypoxia-ischemia, or combined hypoxia-ischemia and exposure groups. MMP-9 mRNA expression was significantly higher in the combined hypoxia-ischemia and exposure group than in the hypoxia-ischemia, sham, or exposure-only groups. The combined exposure group also showed higher TNF-α and total oxidant capacity but lower total antioxidant capacity compared with the other groups. Cerebral edema and infarct volume were greater in the combined group than in the hypoxia-ischemia group, and sensory-motor function was weaker in the combined group.
Unknown authors · 2023
Researchers exposed 5-week-old male Wistar rats to a 2115 MHz RF-EMR signal at 1.51 W/kg SAR for 8 hours. Exposed rats showed higher lipid peroxidation, carbon-centered lipid radicals, and single-strand DNA damage in the brain. The number of BrdU-positive cells in the dentate gyrus decreased, indicating reduced neurogenesis. RF-EMR exposure caused degenerative changes and neuronal loss in dentate gyrus neurons but not in CA3, CA1, or cerebral cortex neurons.
Saka VP, Chitra V, Narayanasamy D · 2023
Researchers exposed primary cortical neurons from neonatal rats to electromagnetic radiation from a mobile phone at 2100 MHz and 1.6 W/kg SAR for two hours. The study assessed the induction of apoptosis through modulation of pro- and anti-apoptotic genes via a mitochondrial pathway. Pyrazole derivatives reduced apoptosis by lowering reactive oxygen species and modulating apoptotic gene levels. The compounds showed antioxidative and anti-apoptotic properties.
Unknown authors · 2023
Researchers divided adult male albino rats into four groups: control, exercise, Wi-Fi exposure, and exercise plus Wi-Fi exposure. Wi-Fi exposure increased oxidative enzymes, decreased antioxidant enzymes, caused neuronal degeneration, and reduced PCNA and ZO-1 immunoreactivity in the hippocampus. Physical exercise alleviated these Wi-Fi-induced changes.
Unknown authors · 2023
Forty young male Wistar rats were randomly allocated into control, multiple cell phone-exposed, and lipoic acid-treated groups. Exposed rats showed shorter latency to the platform by the fifth day of training but had reduced consolidation of spatial long-term memory. Lipoic acid treatment improved learning and memory, significantly decreasing hippocampal MDA and acetylcholine, increasing glutamate, downregulating Sirt1 and upregulating Atg7.
Unknown authors · 2022
Relationship between cell-phone over-use scale with depression et al. · 2022
Researchers conducted a descriptive-analytical cross-sectional study of 212 students using the Cell-phone Over-use Scale and the Depression Anxiety Stress Scale. The sample was predominantly male (72.2%), aged 21–23 years (46.2%), and single (92.5%). Multiple linear regression showed a significant association between cell phone overuse and higher stress (t=2.614, P=0.010) and anxiety (t=2.209, P=0.028), but not depression (t=1.790, P=0.075).
Calderón et al · 2022
Researchers created an algorithm for the MOBI-Kids study to estimate cumulative specific energy from RF fields and cumulative induced current density from ELF fields in the brain of subjects aged 10 to 24 years. The algorithm considered age, tumour location, phone models, usage patterns, and communication system prevalence over time. Median RF and ELF doses were substantially higher for GSM than 3G systems and varied considerably by brain location. Agreement between RF dose estimates and phone use variables was moderate to null depending on communication system, while agreement for ELF dose was higher but also system-dependent. Duration and number of calls may not be adequate proxies for dose as communication systems become more complex over time.
Unknown authors · 2022
Researchers exposed purified BMSCs to sinusoidal or square waveform electromagnetic fields at 400 µT and 75 Hz for either 1 hour per week or 7 hours per day, then injected them into the left substantia nigra of Parkinsonian rats. Cell morphology analysis showed that sinusoidal EMF exposure caused most BMSCs to differentiate into neurons, including large and small neurons with apparent synapses. Square EMF exposure produced mainly astrocytes, microglia, and oligodendrocytes, while both BMSCs alone and sinusoidal EMF-exposed BMSCs improved locomotor activity in the rats.
Unknown authors · 2022
Unknown authors · 2022
Researchers tested the behavior of 92 haddock larvae in a raceway tank simulating magnetic fields from a DC subsea cable. The larvae were exposed to a magnetic field intensity ranging from 50 to 150 µT. Exposure did not affect the spatial distribution of larvae in the raceway. Larvae were categorized as nonexploratory (78%) or exploratory (22%) based on their behavior. Exposure reduced median swimming speed by 60% and median acceleration by 38% in nonexploratory larvae, but had no effect on exploratory larvae.
Unknown authors · 2022
Researchers evaluated the effect of ELF-MFs on sleep induction in male rats using behavioral tests and oxalate acid density measurements. The results showed that the activity of rats and oxalate acid concentration reduced after ELF-MF exposure. Reduction of velocity and frequency in the open-field test was attributed to sleepiness.
Unknown authors · 2022
Living near magnetic and electric fields from high-voltage towers threatens cognitive and behavioral health in humans and animals. These fields cause cognitive and behavioral disorders in living beings. The authors state that more research is needed because it threatens cognitive health.
Unknown authors · 2022
Researchers assessed short-term behavioural responses of 15 juvenile thornback rays to direct and alternating 50 Hz uniform 450-μT magnetic fields using a 1-hour focal-sampling design. Magnetic fields were controlled in laboratory conditions with a custom-made Helmholtz coil device. Behavioural responses did not significantly differ between control and exposed rays during the morning period. Rays exposed to direct current magnetic fields increased their activity during the midday period. Alternating current exposure produced synchronisation patterns with high inter-individual variance.