Journal of Medical Systems

, Volume 30, Issue 4, pp 303–307 | Cite as

Nullification of Electromagnetic Radiation: 50 Hz Artifact During Electroencephalogram Recording

  • S. Murali
  • Vladimir V. Kulish
Original Paper


This paper discusses the 50-Hz artifact observed during EEG recording of three patients, using Mindset24 equipment in a biomedical laboratory along with other instruments. The artifact at 50 Hz is created due to electromagnetic (EM) radiation from the environment. Perhaps, the nullification of 50 Hz artifact occurs by the three important means such as (a) grounding of far-field EM current when the patient touches the equipment metal casing, (b) connecting the electrodes in a sequence to obtain differential potentials with suppressed near-field EM radiation potentials of the scalp, and (c) destructive interferences of the EM waves.


EEG Brain waves 50-Hz artifact Electromagnetic radiation Destructive interference 



The authors acknowledge grants provided by Nanyang Technological University Research Council (RG18/01) and Biomedical Engineering Research Center at in support of the project. Gratitude is submitted to Mrs Ma Tin Swe Hlaing, Mrs Anna Kulish and Mrs Bharathy Murali for the assistance provided during the experimentation.


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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  1. 1.Singapore Institute of Manufacturing TechnologySingaporeSingapore
  2. 2.School of Mechanical and Aerospace EngineeringNanyang Technological UniversitySingaporeSingapore

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