title: The alteration of spontaneous low frequency oscillations caused by acute electromagnetic fields exposure.
abstract: OBJECTIVE
  The motivation of this study is to evaluate the possible alteration of regional resting state brain activity induced by the acute radiofrequency electromagnetic field (RF-EMF) exposure (30min) of Long Term Evolution (LTE) signal.
  
  
  METHODS
  We designed a controllable near-field LTE RF-EMF exposure environment. Eighteen subjects participated in a double-blind, crossover, randomized and counterbalanced experiment including two sessions (real and sham exposure). The radiation source was close to the right ear. Then the resting state fMRI signals of human brain were collected before and after the exposure in both sessions. We measured the amplitude of low frequency fluctuation (ALFF) and fractional ALFF (fALFF) to characterize the spontaneous brain activity.
  
  
  RESULTS
  We found the decreased ALFF value around in left superior temporal gyrus, left middle temporal gyrus, right superior temporal gyrus, right medial frontal gyrus and right paracentral lobule after the real exposure. And the decreased fALFF value was also detected in right medial frontal gyrus and right paracentral lobule.
  
  
  CONCLUSIONS
  The study provided the evidences that 30min LTE RF-EMF exposure modulated the spontaneous low frequency fluctuations in some brain regions.
  
  
  CONCLUSIONS
  With resting state fMRI, we found the alteration of spontaneous low frequency fluctuations induced by the acute LTE RF-EMF exposure.
authors.affiliation: China Academy of Telecommunication Research of Ministry of Industry and Information Technology, Beijing, China; University of Chinese Academy of Sciences, Beijing, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Lv
authors.affiliation: Department of Radiology, PLA General Hospital, Beijing, China.
authors.forename: Zhiye
authors.initials: Z
authors.lastname: Chen
authors.affiliation: China Academy of Telecommunication Research of Ministry of Industry and Information Technology, Beijing, China.
authors.forename: Tongning
authors.initials: T
authors.lastname: Wu
authors.affiliation: China Academy of Telecommunication Research of Ministry of Industry and Information Technology, Beijing, China.
authors.forename: Qing
authors.initials: Q
authors.lastname: Shao
authors.affiliation: University of Chinese Academy of Sciences, Beijing, China.
authors.forename: Duo
authors.initials: D
authors.lastname: Yan
authors.affiliation: Department of Radiology, PLA General Hospital, Beijing, China. Electronic address: cjr.malin@vip.163.com.
authors.forename: Lin
authors.initials: L
authors.lastname: Ma
authors.affiliation: University of Chinese Academy of Sciences, Beijing, China. Electronic address: luk@ucas.ac.cn.
authors.forename: Ke
authors.initials: K
authors.lastname: Lu
authors.affiliation: China Academy of Telecommunication Research of Ministry of Industry and Information Technology, Beijing, China. Electronic address: xieyi@catr.cn.
authors.forename: Yi
authors.initials: Y
authors.lastname: Xie
mesh_terms: D000328:Adult; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D018592:Cross-Over Studies; D004311:Double-Blind Method; D004574:Electromagnetic Fields; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male
keywords: ALFF; Amplitude of low frequency fluctuation; LTE; Long Term Evolution; MFG_R; MTG_L; PCL_R; RF-EMF; Radiofrequency electromagnetic fields; Resting state fMRI; STG_L; STG_R; amplitude of low frequency fluctuation; fALFF; fractional amplitude of low frequency fluctuation; left middle temporal gyrus; left superior temporal gyrus; radiofrequency electromagnetic fields; right medial frontal gyrus; right paracentral lobule; right superior temporal gyrus