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Wallace J, Yahia-Cherif L, Gitton C, Hugueville L, Lemaréchal JD, Selmaoui B. Modulation of magnetoencephalography alpha band activity by radiofrequency electromagnetic field depicted in sensor and source space. Sci Rep 2021; 11:23403. [PMID: 34862418 PMCID: PMC8642443 DOI: 10.1038/s41598-021-02560-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 11/12/2021] [Indexed: 01/05/2023] Open
Abstract
Several studies reported changes in spontaneous electroencephalogram alpha band activity related to radiofrequency electromagnetic fields, but findings showed both an increase and a decrease of its spectral power or no effect. Here, we studied the alpha band modulation after 900 MHz mobile phone radiofrequency exposure and localized cortical regions involved in these changes, via a magnetoencephalography (MEG) protocol with healthy volunteers in a double-blind, randomized, counterbalanced crossover design. MEG was recorded during eyes open and eyes closed resting-state before and after radiofrequency exposure. Potential confounding factors, known to affect alpha band activity, were assessed as control parameters to limit bias. Entire alpha band, lower and upper alpha sub-bands MEG power spectral densities were estimated in sensor and source space. Biochemistry assays for salivary biomarkers of stress (cortisol, chromogranin-A, alpha amylase), heart rate variability analysis and high-performance liquid chromatography for salivary caffeine concentration were realized. Results in sensor and source space showed a significant modulation of MEG alpha band activity after the radiofrequency exposure, with different involved cortical regions in relation to the eyes condition, probably because of different attention level with open or closed eyes. None of the control parameters reported a statistically significant difference between experimental sessions.
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Affiliation(s)
- Jasmina Wallace
- Department of Experimental Toxicology and Modeling (TEAM), Institut National de l'Environnement Industriel et des Risques (INERIS), Parc Technologique Alata, BP 2, 60550, Verneuil-en-Halatte, France
- PériTox Laboratory, UMR-I 01 INERIS, Université de Picardie Jules Verne, 80025, Amiens, France
| | - Lydia Yahia-Cherif
- Centre De NeuroImagerie De Recherche (CENIR), Institut du Cerveau et de la Moelle épinière (ICM), 75013, Paris, France
- Inserm U 1127, CNRS UMR 7225, Institut du Cerveau et de la Moelle épinière (ICM), Sorbonne Université, 75013, Paris, France
| | - Christophe Gitton
- Centre De NeuroImagerie De Recherche (CENIR), Institut du Cerveau et de la Moelle épinière (ICM), 75013, Paris, France
- Inserm U 1127, CNRS UMR 7225, Institut du Cerveau et de la Moelle épinière (ICM), Sorbonne Université, 75013, Paris, France
| | - Laurent Hugueville
- Centre De NeuroImagerie De Recherche (CENIR), Institut du Cerveau et de la Moelle épinière (ICM), 75013, Paris, France
- Inserm U 1127, CNRS UMR 7225, Institut du Cerveau et de la Moelle épinière (ICM), Sorbonne Université, 75013, Paris, France
| | - Jean-Didier Lemaréchal
- Centre De NeuroImagerie De Recherche (CENIR), Institut du Cerveau et de la Moelle épinière (ICM), 75013, Paris, France
- Inserm U 1127, CNRS UMR 7225, Institut du Cerveau et de la Moelle épinière (ICM), Sorbonne Université, 75013, Paris, France
| | - Brahim Selmaoui
- Department of Experimental Toxicology and Modeling (TEAM), Institut National de l'Environnement Industriel et des Risques (INERIS), Parc Technologique Alata, BP 2, 60550, Verneuil-en-Halatte, France.
- PériTox Laboratory, UMR-I 01 INERIS, Université de Picardie Jules Verne, 80025, Amiens, France.
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Malik S, Pati AK, Parganiha A. Short- and long-duration exposures to cell-phone radiofrequency waves produce dichotomous effects on phototactic response and circadian characteristics of locomotor activity rhythm in zebrafish, Danio rerio. BIOL RHYTHM RES 2021. [DOI: 10.1080/09291016.2019.1665942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Shikha Malik
- Chronobiology and Animal Behavior Laboratory, School of Studies in Life Science, Pandit Ravishankar Shukla University, Raipur, India
| | - Atanu Kumar Pati
- Chronobiology and Animal Behavior Laboratory, School of Studies in Life Science, Pandit Ravishankar Shukla University, Raipur, India
- School of Zoology, Gangadhar Meher University, Sambalpur, India
- Center for Translational Chronobiology, Pandit Ravishankar Shukla University, Raipur, India
| | - Arti Parganiha
- Chronobiology and Animal Behavior Laboratory, School of Studies in Life Science, Pandit Ravishankar Shukla University, Raipur, India
- Center for Translational Chronobiology, Pandit Ravishankar Shukla University, Raipur, India
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Hu C, Zuo H, Li Y. Effects of Radiofrequency Electromagnetic Radiation on Neurotransmitters in the Brain. Front Public Health 2021; 9:691880. [PMID: 34485223 PMCID: PMC8415840 DOI: 10.3389/fpubh.2021.691880] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 07/13/2021] [Indexed: 12/29/2022] Open
Abstract
With the rapid development of electronic information in the past 30 years, technical achievements based on electromagnetism have been widely used in various fields pertaining to human production and life. Consequently, electromagnetic radiation (EMR) has become a substantial new pollution source in modern civilization. The biological effects of EMR have attracted considerable attention worldwide. The possible interaction of EMR with human organs, especially the brain, is currently where the most attention is focused. Many studies have shown that the nervous system is an important target organ system sensitive to EMR. In recent years, an increasing number of studies have focused on the neurobiological effects of EMR, including the metabolism and transport of neurotransmitters. As messengers of synaptic transmission, neurotransmitters play critical roles in cognitive and emotional behavior. Here, the effects of EMR on the metabolism and receptors of neurotransmitters in the brain are summarized.
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Affiliation(s)
- Cuicui Hu
- Anhui Medical University, Academy of Life Sciences, Hefei, China.,Department of Experimental Pathology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Hongyan Zuo
- Department of Experimental Pathology, Beijing Institute of Radiation Medicine, Beijing, China
| | - Yang Li
- Anhui Medical University, Academy of Life Sciences, Hefei, China.,Department of Experimental Pathology, Beijing Institute of Radiation Medicine, Beijing, China
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Yang L, Zhang C, Chen Z, Li C, Wu T. Functional and network analyses of human exposure to long-term evolution signal. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:5755-5773. [PMID: 32974829 DOI: 10.1007/s11356-020-10728-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 09/02/2020] [Indexed: 06/11/2023]
Abstract
Human exposure to the electromagnetic field emitted by wireless communication systems has raised public concerns. There were claims of the potential association of some neurophysiological disorders with the exposure, but the mechanism is yet to be established. The wireless networks, recently, experience a transition from the 4th generation (4G) to 5th generation (5G), while 4G long-term evolution (LTE) is still the frequently used signal in wireless communication. In the study, exposure experiments were conducted using the LTE signal. The subjects were divided into sham and real exposure groups. Before and after the exposure experiments, they underwent functional magnetic resonance imaging. Within-session and between-session comparisons have been executed for functional connectivity and network properties. Individual specific absorption rate (SAR) was also calculated. The results indicated that acute LTE exposure beneath the safety limits modulated both the functional connection and graph-based properties. To characterize the effect of functional activity, SAR averaged over a certain tissue mass was not an appropriate metric. The potential neurophysiological effect of 5G exposure has also been discussed in the study.
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Affiliation(s)
- Lei Yang
- China Academy of Information and Communications Technology, Beijing, China
| | - Chen Zhang
- China Academy of Information and Communications Technology, Beijing, China
| | - Zhiye Chen
- Hainan Hospital of Chinese People's Liberation Army General Hospital, Beijing, China
| | - Congsheng Li
- China Academy of Information and Communications Technology, Beijing, China
| | - Tongning Wu
- China Academy of Information and Communications Technology, Beijing, China.
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Wallace J, Selmaoui B. Effect of mobile phone radiofrequency signal on the alpha rhythm of human waking EEG: A review. ENVIRONMENTAL RESEARCH 2019; 175:274-286. [PMID: 31146099 DOI: 10.1016/j.envres.2019.05.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Revised: 05/09/2019] [Accepted: 05/10/2019] [Indexed: 05/14/2023]
Abstract
In response to the exponential increase in mobile phone use and the resulting increase in exposure to radiofrequency electromagnetic fields (RF-EMF), there have been several studies to investigate via electroencephalography (EEG) whether RF-EMF exposure affects brain activity. Data in the literature have shown that exposure to radiofrequency signals modifies the waking EEG with the main effect on the alpha band frequency (8-13 Hz). However, some studies have reported an increase in alpha band power, while others have shown a decrease, and other studies showed no effect on EEG power. Given that changes in the alpha amplitude are associated with attention and some cognitive aspects of human behavior, researchers deemed necessary to look whether alpha rhythm was modulated under RF-EMF exposure. The present review aims at comparing and discussing the main findings obtained so far regarding RF-EMF effects on alpha rhythm of human waking spontaneous EEG, focusing on differences in protocols between studies, which might explain the observed discrepancies and inconclusive results.
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Affiliation(s)
- Jasmina Wallace
- Experimental Toxicology Unit, National Institute of Industrial Environment and Risks (INERIS), Verneuil-en-Halatte, France; PériTox Laboratory, UMR-I-01, Faculty of Medicine, University of Picardy Jules Verne, Amiens, France
| | - Brahim Selmaoui
- Experimental Toxicology Unit, National Institute of Industrial Environment and Risks (INERIS), Verneuil-en-Halatte, France; PériTox Laboratory, UMR-I-01, Faculty of Medicine, University of Picardy Jules Verne, Amiens, France.
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Wei Y, Yang J, Chen Z, Wu T, Lv B. Modulation of resting-state brain functional connectivity by exposure to acute fourth-generation long-term evolution electromagnetic field: An fMRI study. Bioelectromagnetics 2018; 40:42-51. [PMID: 30562416 DOI: 10.1002/bem.22165] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Accepted: 11/19/2018] [Indexed: 01/01/2023]
Affiliation(s)
- Yiwen Wei
- China Academy of Information and Communications Technology; Beijing China
- School of Electronic Engineering; Beijing University of Posts and Telecommunications; Beijing China
| | - Jiayi Yang
- Institute of Electrical Engineering; Chinese Academy of Sciences; Beijing China
| | - Zhiye Chen
- Chinese PLA General Hospital; Beijing China
| | - Tongning Wu
- China Academy of Information and Communications Technology; Beijing China
| | - Bin Lv
- China Academy of Information and Communications Technology; Beijing China
- Ping An Technology (Shenzhen); Shenzhen China
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Zhou H, Dong G, Zheng W, Wang S, Wang L, Zhi W, Wang C. Radiofrequency radiation at 2.856 GHz does not affect key cellular endpoints in neuron-like PC12 cells. Electromagn Biol Med 2018; 38:102-110. [PMID: 30482060 DOI: 10.1080/15368378.2018.1550787] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
To investigate the potential cytotoxicity of radiofrequency (RF) radiation on central nervous system, rat pheochromocytoma (PC12) cells were exposed to 2.856 GHz RF radiation at a specific absorption rate (SAR) of 4 W/kg for 8 h a day for 2 days in 35 mm Petri dishes. During exposure, the real-time variation of the culture medium temperature was monitored in the first hour. Reactive oxygen species (ROS) production, intracellular Ca2+ concentration, and cell apoptosis rate were assessed immediately after exposure by flow cytometry. The results showed that the medium temperature raised about 0.93 °C, but no significant changes were observed in apoptosis, ROS levels or intracellular Ca2+ concentration after treatment. Although several studies suggested that RF radiation does indeed cause neurological effects, this study presented inconsistent results, indicating that 2.856 GHz RF radiation exposure at a SAR of 4 W/kg does not have a dramatic impact on PC12 cells, and suggests the need for further investigation on the key cellular endpoints of other nerve cells after exposure to RF radiation.
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Affiliation(s)
- Hongmei Zhou
- a Department of Experimental Pathology , Beijing Institute of Radiation Medicine , Beijing P. R. China
| | - Guofu Dong
- a Department of Experimental Pathology , Beijing Institute of Radiation Medicine , Beijing P. R. China
| | - Wen Zheng
- a Department of Experimental Pathology , Beijing Institute of Radiation Medicine , Beijing P. R. China
| | - Shuiming Wang
- a Department of Experimental Pathology , Beijing Institute of Radiation Medicine , Beijing P. R. China
| | - Lifeng Wang
- a Department of Experimental Pathology , Beijing Institute of Radiation Medicine , Beijing P. R. China
| | - Weijia Zhi
- a Department of Experimental Pathology , Beijing Institute of Radiation Medicine , Beijing P. R. China
| | - Changzhen Wang
- a Department of Experimental Pathology , Beijing Institute of Radiation Medicine , Beijing P. R. China
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8
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Curcio G. Exposure to Mobile Phone-Emitted Electromagnetic Fields and Human Attention: No Evidence of a Causal Relationship. Front Public Health 2018. [PMID: 29527523 PMCID: PMC5829032 DOI: 10.3389/fpubh.2018.00042] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In the past 20 years of research regarding effects of mobile phone-derived electromagnetic fields (EMFs) on human cognition, attention has been one of the first and most extensively investigated functions. Different domains investigated covered selective, sustained, and divided attention. Here, the most relevant studies on this topic have been reviewed and discussed. A total of 43 studies are reported and summarized: of these, 31 indicated a total absence of statistically significant difference between real and sham signal, 9 showed a partial improvement of attentional performance (mainly increase in speed of performance and/or improvement of accuracy) as a function of real exposure, while the remaining 3 showed inconsistent results (i.e., increased speed in some tasks and slowing in others) or even a worsening in performance (reduced speed and/or deteriorated accuracy). These results are independent of the specific attentional domain investigated. This scenario allows to conclude that there is a substantial lack of evidence about a negative influence of non-ionizing radiations on attention functioning. Nonetheless, published literature is very heterogeneous under the point of view of methodology (type of signal, exposure time, blinding), dosimetry (accurate evaluation of specific absorption rate-SAR or emitted power), and statistical analyses, making arduous a conclusive generalization to everyday life. Some remarks and suggestions regarding future research are proposed.
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Affiliation(s)
- Giuseppe Curcio
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
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9
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Zhang J, Sumich A, Wang GY. Acute effects of radiofrequency electromagnetic field emitted by mobile phone on brain function. Bioelectromagnetics 2017; 38:329-338. [PMID: 28426166 DOI: 10.1002/bem.22052] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 03/23/2017] [Indexed: 01/13/2023]
Abstract
Due to its attributes, characteristics, and technological resources, the mobile phone (MP) has become one of the most commonly used communication devices. Historically, ample evidence has ruled out the substantial short-term impact of radiofrequency electromagnetic field (RF-EMF) emitted by MP on human cognitive performance. However, more recent evidence suggests potential harmful effects associated with MP EMF exposure. The aim of this review is to readdress the question of whether the effect of MP EMF exposure on brain function should be reopened. We strengthen our argument focusing on recent neuroimaging and electroencephalography studies, in order to present a more specific analysis of effects of MP EMF exposure on neurocognitive function. Several studies indicate an increase in cortical excitability and/or efficiency with EMF exposure, which appears to be more prominent in fronto-temporal regions and has been associated with faster reaction time. Cortical excitability might also underpin disruption to sleep. However, several inconsistent findings exist, and conclusions regarding adverse effects of EMF exposure are currently limited. It also should be noted that the crucial scientific question of the effect of longer-term MP EMF exposure on brain function remains unanswered and essentially unaddressed. Bioelectromagnetics. 38:329-338, 2017. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Jun Zhang
- School of Electrical Engineering and Automation, Tianjin University, Tianjin City, China
| | - Alexander Sumich
- Division of Psychology, School of Social Sciences, Nottingham Trent University, Nottingham, United Kingdom
| | - Grace Y Wang
- Department of Psychology, AUT University, Auckland, New Zealand
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Bhargav H, N K M, Varambally S, Mooventhan A, Bista S, Singh D, Chhabra H, Venkatasubramanian G, T M S, H R N. Acute effects of 3G mobile phone radiations on frontal haemodynamics during a cognitive task in teenagers and possible protective value of Om chanting. Int Rev Psychiatry 2016; 28:288-98. [PMID: 27266893 DOI: 10.1080/09540261.2016.1188784] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Mobile phone induced electromagnetic field (MPEMF) as well as chanting of Vedic mantra 'OM' has been shown to affect cognition and brain haemodynamics, but findings are still inconclusive. Twenty right-handed healthy teenagers (eight males and 12 females) in the age range of 18.25 ± 0.44 years were randomly divided into four groups: (1) MPONOM (mobile phone 'ON' followed by 'OM' chanting); (2) MPOFOM (mobile phone 'OFF' followed by 'OM' chanting); (3) MPONSS (mobile phone 'ON' followed by 'SS' chanting); and (4) MPOFSS (mobile phone 'OFF' followed by 'SS' chanting). Brain haemodynamics during Stroop task were recorded using a 64-channel fNIRS device at three points of time: (1) baseline, (2) after 30 min of MPON/OF exposure, and (3) after 5 min of OM/SS chanting. RM-ANOVA was applied to perform within- and between-group comparisons, respectively. Between-group analysis revealed that total scores on incongruent Stroop task were significantly better after OM as compared to SS chanting (MPOFOM vs MPOFSS), pre-frontal activation was significantly lesser after OM as compared to SS chanting in channel 13. There was no significant difference between MPON and MPOF conditions for Stroop performance, as well as brain haemodynamics. These findings need confirmation through a larger trial in future.
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Affiliation(s)
- Hemant Bhargav
- a Anvesana Research Laboratories, Division of Yoga and Life Sciences , S-VYASA Yoga University , Bangalore , India
| | - Manjunath N K
- a Anvesana Research Laboratories, Division of Yoga and Life Sciences , S-VYASA Yoga University , Bangalore , India
| | - Shivarama Varambally
- b Department of Psychiatry , National Institute of Mental Health and Neurosciences (NIMHANS) , Bangalore , India
| | - A Mooventhan
- a Anvesana Research Laboratories, Division of Yoga and Life Sciences , S-VYASA Yoga University , Bangalore , India
| | - Suman Bista
- a Anvesana Research Laboratories, Division of Yoga and Life Sciences , S-VYASA Yoga University , Bangalore , India
| | - Deepeshwar Singh
- a Anvesana Research Laboratories, Division of Yoga and Life Sciences , S-VYASA Yoga University , Bangalore , India
| | - Harleen Chhabra
- b Department of Psychiatry , National Institute of Mental Health and Neurosciences (NIMHANS) , Bangalore , India
| | - Ganesan Venkatasubramanian
- b Department of Psychiatry , National Institute of Mental Health and Neurosciences (NIMHANS) , Bangalore , India
| | - Srinivasan T M
- a Anvesana Research Laboratories, Division of Yoga and Life Sciences , S-VYASA Yoga University , Bangalore , India
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Lv B, Shao Q, Chen Z, Ma L, Wu T. Effects of acute electromagnetic fields exposure on the interhemispheric homotopic functional connectivity during resting state. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2016; 2015:1813-6. [PMID: 26736632 DOI: 10.1109/embc.2015.7318732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In this paper, we aimed to investigate the possible effects of acute radiofrequency electromagnetic fields (EMF) on the interhemispheric homotopic functional connectivity with resting state functional magnetic resonance imaging (fMRI) technique. We designed a controllable LTE-related EMF exposure environment at 2.573 GHz and performed the 30 min real/sham exposure experiments on human brain under the safety limits. The resting state fMRI signals were collected before and after EMF exposure. Then voxel-mirrored homotopic connectivity method was utilized to evaluate the acute effects of LTE EMF exposure on the homotopic functional connectivity between two human hemispheres. Based on our previous research, we further demonstrated that the 30 min short-term LTE EMF exposure would modulate the interhemispheric homotopic functional connectivity in resting state around the medial frontal gyrus and the paracentral lobule during the real exposure.
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Singh MM, Pati AK. Effects of radiation emanating from base transceiver station and mobile phone on sleep, circadian rhythm and cognition in humans – a review. BIOL RHYTHM RES 2016. [DOI: 10.1080/09291016.2015.1116741] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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The alteration of spontaneous low frequency oscillations caused by acute electromagnetic fields exposure. Clin Neurophysiol 2014; 125:277-86. [DOI: 10.1016/j.clinph.2013.07.018] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Revised: 07/03/2013] [Accepted: 07/20/2013] [Indexed: 02/07/2023]
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Hao D, Yang L, Chen S, Tian Y, Wu S. 916 MHz electromagnetic field exposure affects rat behavior and hippocampal neuronal discharge. Neural Regen Res 2012; 7:1488-92. [PMID: 25657684 PMCID: PMC4308780 DOI: 10.3969/j.issn.1673-5374.2012.19.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2011] [Accepted: 05/16/2012] [Indexed: 11/23/2022] Open
Abstract
Wistar rats were exposed to a 916 MHz, 10 W/m2 mobile phone electromagnetic field for 6 hours a day, 5 days a week. Average completion times in an eight-arm radial maze were longer in the exposed rats than control rats after 4–5 weeks of exposure. Error rates in the exposed rats were greater than the control rats at 6 weeks. Hippocampal neurons from the exposed rats showed irregular firing patterns during the experiment, and they exhibited decreased spiking activity 6–9 weeks compared with that after 2–5 weeks of exposure. These results indicate that 916 MHz electromagnetic fields influence learning and memory in rats during exposure, but long-term effects are not obvious.
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Affiliation(s)
- Dongmei Hao
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing 100124, China
| | - Lei Yang
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing 100124, China
| | - Su Chen
- College of Biomedical Engineering, South-Central University for Nationalities, Wuhan 430074, Hubei Province, China
| | - Yonghao Tian
- College of Biomedical Engineering, South-Central University for Nationalities, Wuhan 430074, Hubei Province, China
| | - Shuicai Wu
- College of Life Science and Bioengineering, Beijing University of Technology, Beijing 100124, China
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Vecchio F, Tombini M, Buffo P, Assenza G, Pellegrino G, Benvenga A, Babiloni C, Rossini PM. Mobile phone emission increases inter-hemispheric functional coupling of electroencephalographic alpha rhythms in epileptic patients. Int J Psychophysiol 2012; 84:164-71. [DOI: 10.1016/j.ijpsycho.2012.02.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 01/25/2012] [Accepted: 02/01/2012] [Indexed: 01/16/2023]
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