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The international 10–20 system revisited: Cartesian and spherical co-ordinates

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Summary

Methods like dipole source localization require an exact specification of the co-ordinates of electrode positions. Different values for the co-ordinates of F3, F4, P3 and P4 are encountered in literature. This is due to the,unexpected complexity of the calculations involved and aggravated by an inaccurate but widely used control procedure for the placement of these electrodes. We present a table of co-ordinates for the 10–20 system together with a method for determining the co-ordinates of mid-way positions within the 10–20 system. The consequence of using erroneous co-ordinates on the accuracy of dipole source localization is discussed.

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Authors and Affiliations

  1. Co-operation Centre Tilburg and Eindhoven Universities, Physiological Psychology Section, Tilburg University, Tilburg, The Netherlands

    Koen B. E. Böcker & Margaretha M. C. van den Berg-Lenssen

  2. National Aerospace Laboratory NLR, Amsterdam, The Netherlands

    Jurgen A. G. van Avermaete

  3. Division of Medical Electrical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands

    Margaretha M. C. van den Berg-Lenssen

Authors
  1. Koen B. E. Böcker
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  2. Jurgen A. G. van Avermaete
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  3. Margaretha M. C. van den Berg-Lenssen
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Correspondence to Koen B. E. Böcker.

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Böcker, K.B.E., van Avermaete, J.A.G. & van den Berg-Lenssen, M.M.C. The international 10–20 system revisited: Cartesian and spherical co-ordinates. Brain Topogr 6, 231–235 (1994). https://doi.org/10.1007/BF01187714

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  • DOI: https://doi.org/10.1007/BF01187714

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